Magnum engine questions

[Wildman]

I actually wish I could do an emissions legal Magnum swap. With my 04 though, I need to use a hemi from an 04 or 05. Any later, and the bus changes.

I guess there are two ways to look at this. It's easier for you to swap a Hemi than it is for the pre-2000 TJ folks.


All this is from Hotwire Auto.com


For anyone wanting to know here is the Mopar Swap Grid.

MOPAR Swap Grid
We've developed the charts below to help in the decision process when looking at LATE model Mopar engine swaps.

Review the list below to find your vehicle and check the computer bus to find matching donor vehicles. The easiest swaps are accomplished by using the same computer bus.

Protocol List By Vehicle:

Ram				Durango
Year	Bus	Engines		Year	Bus	Engines
1996	CCD	3.9L, 5.2L, 5.9L
1997	CCD	3.9L, 5.2L, 5.9L
1998	CCD	3.9L, 5.2L, 5.9L		1998	CCD	3.9L, 5.2L, 5.9L
1999	CCD	3.9L, 5.2L, 5.9L		1999	CCD	3.9L, 5.2L, 5.9L
2000	CCD	3.9L, 5.2L, 5.9L		2000	CCD	4.7L, 5.2L, 5.9L
2001	CCD	3.9L, 5.2L, 5.9L		2001	PCI	4.7L, 5.9L
2002	PCI	3.7L, 4.7L, 5.9L		2002	PCI	4.7L, 5.9L
2003	PCI	3.7L, 4.7L, 5.7L, 5.9L		2003	PCI	4.7L, 5.9L
2004	PCI	3.7L, 4.7L, 5.7L		2004	CAN	3.7L, 4.7L, 5.7L
2005	PCI	3.7L, 4.7L, 5.7L, 8.3L		2005	CAN	3.7L, 4.7L, 5.7L
2006	CAN	3.7L, 4.7L, 5.7L, 8.3L		2006	CAN	3.7L, 4.7L, 5.7L
2007	CAN	3.7L, 4.7L, 5.7L		2007	CAN	3.7L, 4.7L, 5.7L
2008	CAN	3.7L, 4.7L, 5.7L		2008	CAN	3.7L, 4.7L, 5.7L
2009	CAN	3.7L, 4.7L, 5.7L		2009	CAN	3.7L, 4.7L, 5.7L

Dakota				Wrangler
Year	Bus	Engines		Year	Bus	Engines
1996	CCD	2.5L, 3.9L, 5.2L		1996
1997	CCD	2.5L, 3.9L, 5.2L		1997	CCD	2.5L, 4.0L
1998	CCD	2.5L, 3.9L, 5.2L, 5.9L		1998	CCD	2.5L, 4.0L
1999	CCD	2.5L, 3.9L, 5.2L, 5.9L		1999	CCD	2.5L, 4.0L
2000	CCD	2.5L, 3.9L, 4.7L, 5.9L		2000	CCD	2.5L, 4.0L
2001	PCI	2.5L, 3.9L, 4.7L, 5.9L		2001	PCI	2.5L, 4.0L
2002	PCI	2.5L, 3.9L, 4.7L, 5.9L		2002	PCI	2.5L, 4.0L
2003	PCI	3.9L, 4.7L, 5.9L		2003	PCI	2.4L, 4.0L
2004	PCI	3.7L, 4.7L		2004	PCI	2.4L, 4.0L
2005	CAN	3.7L, 4.7L		2005	PCI	2.4L, 4.0L
2006	CAN	3.7L, 4.7L		2006	PCI	2.4L, 4.0L
2007	CAN	3.7L, 4.7L		2007	CAN	3.8L
2008	CAN	3.7L, 4.7L		2008	CAN	3.8L
2009	CAN	3.7L, 4.7L		2009	CAN	3.8L
Grand Cherokee				Cherokee
Year	Bus	Engines		Year	Bus	Engines
1996	CCD	4.0L, 5.2L		1996	CCD	2.5L, 4.0L
1997	CCD	4.0L, 5.2L, 5.9L		1997	CCD	2.5L, 4.0L
1998	CCD	4.0L, 5.2L, 5.9L		1998	CCD	2.5L, 4.0L
1999	PCI	4.0L, 4.7L		1999	CCD	2.5L, 4.0L
2000	PCI	4.0L, 4.7L		2000	CCD	2.5L, 4.0L
2001	PCI	4.0L, 4.7L		2001	CCD	4.0L
2002	PCI	4.0L, 4.7L
2003	PCI	4.0L, 4.7L
2004	PCI	4.0L, 4.7L
2005	CAN	3.7L, 4.7L, 5.7L
2006	CAN	3.7L, 4.7L, 5.7L, 6.1L
2007	CAN	3.7L, 4.7L, 5.7L, 6.1L

And then for anyone wondering what their prices are:

TJ Conversion Harness Prices

ITEM	PART NUMBER	PRICE
5.7L HEMI / 545RFE Automatic Jeep TJ Conv 2001-2006	R-0025	$1,885.00
5.7L HEMI Manual Jeep TJ Conversion 2001-2006	R-0025-1	$1,885.00
5.7L HEMI / 545RFE Automatic Jeep TJ Conv 1997-2000	R-0025-2	$2,035.00
5.7L HEMI Manual Jeep TJ Conversion 1997-2000	R-0025-3	$2,035.00
6.1L HEMI / 545RFE Automatic Jeep TJ Conv 2001-2006	R-0025-4	$1,885.00
6.1L HEMI Manual Jeep TJ Conversion 2001-2006	R-0025-5	$1,885.00
6.1L HEMI Automatic Jeep TJ Conversion 1997-2000	R-0025-6	$2,035.00
6.1L HEMI Manual Jeep TJ Conversion 1997-2000	R-0025-7	$2,035.00
5.2L/5.9L Dodge Magnum Automatic Jeep TJ Conversion	R-0029-2	$1,615.00
5.2L/5.9L Dodge Magnum Manual Jeep TJ Conversion	R-0029-3	$1,615.00
1997 & Up Dodge Viper V10 Jeep TJ Conversion	R-0031-2	$1,755.00

Computers, Accessories & More

We have computers and computer re-programming available to make your Jeep project complete. We also carry a number of accessories such as motor mounts and radiators to make your install go smoothly. Please contact us for a complete list of items and pricing.


Important TJ Conversion Notes:

• Jeep made many changes to the TJ over the years, so we have to modify the fuse block harness from your vehicle to work with the new Hemi engine and transmission.
• Remove the fuse block harness from your TJ. The fuse block is located on the front right fender well. Unplug all connectors as close to the fuse block harness as possible and remove the battery cables.
• DO NOT CUT ANY WIRES!
• You will need to send us the Fuse Block harness from your TJ for modification.

Send to:
Squier Inc.
256 Polk Rd. 43
Mena, AR 71953

• When you get the conversion back from us, re-install the fuse block harness to it's original location.
• Lay the new Hemi engine harness over the engine with the trunk of the harness sitting just behind and below the right side fuel rail.
• For 6.1L Hemi motors you will need to remove the intake to route the harness. The main sensor branch with A/C Compressor, Engine Temp, Oil Press, Throttle body, etc will lay under the intake.
• Locate the Driver and Passenger side items and route them around the intake to the correct locations and plug them in.
• Mount the Hemi computer in the factory location and plug in all the connectors.
• Installation of the wiring is pretty much complete at this point but there are some additional items that you may need to address depending on the year of your TJ.
• 1997-2000 TJ’s - You will need to upgrade your instrument cluster. We provide all the information you need to make this swap.
• Pre 2005 TJ’s - You will have to upgrade to the 2005-2006 fuel pump module. A complete 2005-2006 fuel tank and NVLD system upgrade is required for a working check engine light.
• Various Year TJ’s - Some will have to add sensors such as: Battery Temp, Ambient Air Temp, etc.
• You may have an orange open wire under the dash labeled "Overdrive Off Switch". You can hook this wire up through a momentary switch to a ground if you want to be able to disable the overdrive.
• Some older systems will have 2 open wires you need to hook in to your factory brake light switch. These wires will be labeled if they are there.

Jeep TJ Wrangler NVLD Parts List

• 52059627AB - Bracket, Vapor Canister
• 52059630AB - Canister, Vapor
• 04891564AB - Filter, Leak Det Pump Base
• 04891427AB - Detector, Natural Vacuum Leak Detection
• 52059628AA - Hose, Canister to NVLD
• 52059633AB - Hose, NVLD to Filter

And then here are their Magnum V-8 install instructions and their Hemi install instructions. They are just how to hook up their wiring harness.

 

[Mike_H]

I guess there are two ways to look at this. It's easier for you to swap a Hemi than it is for the pre-2000 TJ folks.


All this is from Hotwire Auto.com


For anyone wanting to know here is the Mopar Swap Grid.

MOPAR Swap Grid
We've developed the charts below to help in the decision process when looking at LATE model Mopar engine swaps.

Review the list below to find your vehicle and check the computer bus to find matching donor vehicles. The easiest swaps are accomplished by using the same computer bus.

Protocol List By Vehicle:

Ram				Durango
Year	Bus	Engines		Year	Bus	Engines
1996	CCD	3.9L, 5.2L, 5.9L
1997	CCD	3.9L, 5.2L, 5.9L
1998	CCD	3.9L, 5.2L, 5.9L		1998	CCD	3.9L, 5.2L, 5.9L
1999	CCD	3.9L, 5.2L, 5.9L		1999	CCD	3.9L, 5.2L, 5.9L
2000	CCD	3.9L, 5.2L, 5.9L		2000	CCD	4.7L, 5.2L, 5.9L
2001	CCD	3.9L, 5.2L, 5.9L		2001	PCI	4.7L, 5.9L
2002	PCI	3.7L, 4.7L, 5.9L		2002	PCI	4.7L, 5.9L
2003	PCI	3.7L, 4.7L, 5.7L, 5.9L		2003	PCI	4.7L, 5.9L
2004	PCI	3.7L, 4.7L, 5.7L		2004	CAN	3.7L, 4.7L, 5.7L
2005	PCI	3.7L, 4.7L, 5.7L, 8.3L		2005	CAN	3.7L, 4.7L, 5.7L
2006	CAN	3.7L, 4.7L, 5.7L, 8.3L		2006	CAN	3.7L, 4.7L, 5.7L
2007	CAN	3.7L, 4.7L, 5.7L		2007	CAN	3.7L, 4.7L, 5.7L
2008	CAN	3.7L, 4.7L, 5.7L		2008	CAN	3.7L, 4.7L, 5.7L
2009	CAN	3.7L, 4.7L, 5.7L		2009	CAN	3.7L, 4.7L, 5.7L

Dakota				Wrangler
Year	Bus	Engines		Year	Bus	Engines
1996	CCD	2.5L, 3.9L, 5.2L		1996
1997	CCD	2.5L, 3.9L, 5.2L		1997	CCD	2.5L, 4.0L
1998	CCD	2.5L, 3.9L, 5.2L, 5.9L		1998	CCD	2.5L, 4.0L
1999	CCD	2.5L, 3.9L, 5.2L, 5.9L		1999	CCD	2.5L, 4.0L
2000	CCD	2.5L, 3.9L, 4.7L, 5.9L		2000	CCD	2.5L, 4.0L
2001	PCI	2.5L, 3.9L, 4.7L, 5.9L		2001	PCI	2.5L, 4.0L
2002	PCI	2.5L, 3.9L, 4.7L, 5.9L		2002	PCI	2.5L, 4.0L
2003	PCI	3.9L, 4.7L, 5.9L		2003	PCI	2.4L, 4.0L
2004	PCI	3.7L, 4.7L		2004	PCI	2.4L, 4.0L
2005	CAN	3.7L, 4.7L		2005	PCI	2.4L, 4.0L
2006	CAN	3.7L, 4.7L		2006	PCI	2.4L, 4.0L
2007	CAN	3.7L, 4.7L		2007	CAN	3.8L
2008	CAN	3.7L, 4.7L		2008	CAN	3.8L
2009	CAN	3.7L, 4.7L		2009	CAN	3.8L
Grand Cherokee				Cherokee
Year	Bus	Engines		Year	Bus	Engines
1996	CCD	4.0L, 5.2L		1996	CCD	2.5L, 4.0L
1997	CCD	4.0L, 5.2L, 5.9L		1997	CCD	2.5L, 4.0L
1998	CCD	4.0L, 5.2L, 5.9L		1998	CCD	2.5L, 4.0L
1999	PCI	4.0L, 4.7L		1999	CCD	2.5L, 4.0L
2000	PCI	4.0L, 4.7L		2000	CCD	2.5L, 4.0L
2001	PCI	4.0L, 4.7L		2001	CCD	4.0L
2002	PCI	4.0L, 4.7L
2003	PCI	4.0L, 4.7L
2004	PCI	4.0L, 4.7L
2005	CAN	3.7L, 4.7L, 5.7L
2006	CAN	3.7L, 4.7L, 5.7L, 6.1L
2007	CAN	3.7L, 4.7L, 5.7L, 6.1L

And then for anyone wondering what their prices are:

TJ Conversion Harness Prices

ITEM	PART NUMBER	PRICE
5.7L HEMI / 545RFE Automatic Jeep TJ Conv 2001-2006	R-0025	$1,885.00
5.7L HEMI Manual Jeep TJ Conversion 2001-2006	R-0025-1	$1,885.00
5.7L HEMI / 545RFE Automatic Jeep TJ Conv 1997-2000	R-0025-2	$2,035.00
5.7L HEMI Manual Jeep TJ Conversion 1997-2000	R-0025-3	$2,035.00
6.1L HEMI / 545RFE Automatic Jeep TJ Conv 2001-2006	R-0025-4	$1,885.00
6.1L HEMI Manual Jeep TJ Conversion 2001-2006	R-0025-5	$1,885.00
6.1L HEMI Automatic Jeep TJ Conversion 1997-2000	R-0025-6	$2,035.00
6.1L HEMI Manual Jeep TJ Conversion 1997-2000	R-0025-7	$2,035.00
5.2L/5.9L Dodge Magnum Automatic Jeep TJ Conversion	R-0029-2	$1,615.00
5.2L/5.9L Dodge Magnum Manual Jeep TJ Conversion	R-0029-3	$1,615.00
1997 & Up Dodge Viper V10 Jeep TJ Conversion	R-0031-2	$1,755.00

Computers, Accessories & More

We have computers and computer re-programming available to make your Jeep project complete. We also carry a number of accessories such as motor mounts and radiators to make your install go smoothly. Please contact us for a complete list of items and pricing.


Important TJ Conversion Notes:

• Jeep made many changes to the TJ over the years, so we have to modify the fuse block harness from your vehicle to work with the new Hemi engine and transmission.
• Remove the fuse block harness from your TJ. The fuse block is located on the front right fender well. Unplug all connectors as close to the fuse block harness as possible and remove the battery cables.
• DO NOT CUT ANY WIRES!
• You will need to send us the Fuse Block harness from your TJ for modification.

Send to:
Squier Inc.
256 Polk Rd. 43
Mena, AR 71953

• When you get the conversion back from us, re-install the fuse block harness to it's original location.
• Lay the new Hemi engine harness over the engine with the trunk of the harness sitting just behind and below the right side fuel rail.
• For 6.1L Hemi motors you will need to remove the intake to route the harness. The main sensor branch with A/C Compressor, Engine Temp, Oil Press, Throttle body, etc will lay under the intake.
• Locate the Driver and Passenger side items and route them around the intake to the correct locations and plug them in.
• Mount the Hemi computer in the factory location and plug in all the connectors.
• Installation of the wiring is pretty much complete at this point but there are some additional items that you may need to address depending on the year of your TJ.
• 1997-2000 TJ’s - You will need to upgrade your instrument cluster. We provide all the information you need to make this swap.
• Pre 2005 TJ’s - You will have to upgrade to the 2005-2006 fuel pump module. A complete 2005-2006 fuel tank and NVLD system upgrade is required for a working check engine light.
• Various Year TJ’s - Some will have to add sensors such as: Battery Temp, Ambient Air Temp, etc.
• You may have an orange open wire under the dash labeled "Overdrive Off Switch". You can hook this wire up through a momentary switch to a ground if you want to be able to disable the overdrive.
• Some older systems will have 2 open wires you need to hook in to your factory brake light switch. These wires will be labeled if they are there.

Jeep TJ Wrangler NVLD Parts List

• 52059627AB - Bracket, Vapor Canister
• 52059630AB - Canister, Vapor
• 04891564AB - Filter, Leak Det Pump Base
• 04891427AB - Detector, Natural Vacuum Leak Detection
• 52059628AA - Hose, Canister to NVLD
• 52059633AB - Hose, NVLD to Filter

And then here are their Magnum V-8 install instructions and their Hemi install instructions. They are just how to hook up their wiring harness.

Thanks for that. I remember looking into it when pc1p posted his hemi swap guide. Basically, I have one swap option with my 04 to remain compliant and use factory gages... An 04 or 05 Ram. Having an 03 would it up considerably. The Magnum from the Dakota and Durango are available then.

 

[Wildman]

Thanks for that. I remember looking into it when pc1p posted his hemi swap guide. Basically, I have one swap option with my 04 to remain compliant and use factory gages... An 04 or 05 Ram. Having an 03 would it up considerably. The Magnum from the Dakota and Durango are available then.

This is from their install instructions. You have a few more years as options to swap with.

TJ Hemi Conversion Notes: Our TJ swap uses the 2005 Ram Hemi computer as it’s base. The benefit of this computer is that the Jeep can be made fully emissions complaint when all the parts are put in place. As a result of using this computer, the best engine/transmission combination is a 2003-2008 Hemi with the 545RFE transmission (or a manual transmission). You can use either the 5.7L or the 6.1L Hemi. The 2005 and 2006 Jeep TJ’s are the easiest swap for you to perform. The fuel system and computer system is completely compatible with the 2005 Ram Hemi computer. All other year TJ’s will need to be upgraded to some extent to work with this Hemi swap.

Finding that 03 Durango or Dakota is super hard. They are as rare as hens teeth.

 

[Mike_H]

This is from their install instructions. You have a few more years as options to swap with.



Finding that 03 Durango or Dakota is super hard. They are as rare as hens teeth.

Yeah, I think some of the cars that came with the Hemi are options too. But, for various reasons, the truck seems to be the easiest. I'd have to go back and dig my notes up again...but that is what my memory tells me now.

 

[NashvilleTJ]

Yeah, I think some of the cars that came with the Hemi are options too. But, for various reasons, the truck seems to be the easiest. I'd have to go back and dig my notes up again...but that is what my memory tells me now.

The Gen 3 truck ram hemi has the accessories stacked vertically on the front of the engine - that’s the piece that makes it fit easier into the TJ. Switch to a Gen 4, and you are cutting the frame to clear the accessories which are stacked horizontally.

But the Gen 3 is just ugly. Gen 4 is much cleaner to look at. If you have seen pictures of my engine and see the alternator and A/C compressor sitting up on top - that’s it.

The key on the electronic compatibility is the ECU, more so than the engine. My mill is an ‘06, but I run the ‘05 ECU which is PCI. The wiring harness also has to be modified to ‘05 specs. So you can still run a newer engine - up to ‘09 I think - and still make it work. I think I bought the ECU from Chris at Hotwire.

 

[Gollywomper]

Good stuff. The harness prices are insane. Will keep an eye out for other options to blend the two harnesses.

 

[Wildman]

Good stuff. The harness prices are insane. Will keep an eye out for other options to blend the two harnesses.

Yes they want a premium for their harnesses. Honestly it isn't HARD and if you are going to keep a manual transmission it's actually a little easier.

This guy does a series of videos on doing the swap and if I remember is running a manual transmission.

What I'm trying to say is "You Can Do It". Don't pay someone to build you a harness. Pick up a 1998 TJ PDC & harness and then a 1998-2000 Ram engine harness and build it before you even start the swap. That way when you start the swap you'll have the harness done already.

 

[Gollywomper]

Yes they want a premium for their harnesses. Honestly it isn't HARD and if you are going to keep a manual transmission it's actually a little easier.

This guy does a series of videos on doing the swap and if I remember is running a manual transmission.

What I'm trying to say is "You Can Do It". Don't pay someone to build you a harness. Pick up a 1998 TJ PDC & harness and then a 1998-2000 Ram engine harness and build it before you even start the swap. That way when you start the swap you'll have the harness done already.

Does it matter 2.5 or 4.0 harness? Just need to be from a 98 tj, correct?
The magnum harnesses are everywhere at the upull it yard.

 

[Wildman]

Does it matter 2.5 or 4.0 harness? Just need to be from a 98 tj, correct?
The magnum harnesses are everywhere at the upull it yard.

No I don't think it matters for you with a 1998. The early 1997's had some wiring differences so I had to make sure I got a early model year.

Because you want to use a manual what you do is use the TJ harness and add the wires that are needed for the V-8. So example you would add 2 more injector wires to the harness if you had a 4.0 harness.

Foe me I used the Dodge harness because I was keeping the auto and blended in the TJ part.

 

[Jamison C]

Yes they want a premium for their harnesses. Honestly it isn't HARD and if you are going to keep a manual transmission it's actually a little easier.

This guy does a series of videos on doing the swap and if I remember is running a manual transmission.

What I'm trying to say is "You Can Do It". Don't pay someone to build you a harness. Pick up a 1998 TJ PDC & harness and then a 1998-2000 Ram engine harness and build it before you even start the swap. That way when you start the swap you'll have the harness done already.

Both of these channels covering the magnum swaps are really good.

Speaking of “you can do it,” this guy’s channel has some good info on creating a custom wiring harness for an engine swap. Obviously it’s not a Magnum engine, but it’s a great way to learn how to isolate, trace, label, and read a wiring/pin out diagram. I’ve watched these videos several times.

 

[Gollywomper]

If I grab a harness and PCM from a 98 magnum will it work with all magnum engines of the 98-2000 vintage? Or are there any sensor changes that will require different connectors?
So say a harness and pcm from a 99 Durango then grab a engine from a 98 GC or ram?
Can’t seem to find info on clutch slave cylinder set ups using the dodge nv3500.

 

[Wildman]

If I grab a harness and PCM from a 98 magnum will it work with all magnum engines of the 98-2000 vintage? Or are there any sensor changes that will require different connectors?
So say a harness and pcm from a 99 Durango then grab a engine from a 98 GC or ram?
Can’t seem to find info on clutch slave cylinder set ups using the dodge nv3500.

The engines are all pretty much the same other than the starter location. As far as I know the sensors are all the same.

I can't tell you on the NV3600. Go over here and ask. https://dodgeforum.com/forum/2nd-gen-ram-tech-64/

There are differences between the 318 & 360 as far as the oil pans are different. And the 318 is internally balanced while the 360 is externally balanced.


These are all some good books to read.

https://www.barnesandnoble.com/w/how-to-modify-your-mopar-magnum-v-8-larry-shepard/1118136524
https://www.amazon.com/dp/1613250126/?tag=wranglerorg-20
https://www.amazon.com/dp/1613255497/?tag=wranglerorg-20
https://www.amazon.com/dp/1613250584/?tag=wranglerorg-20

 

[Gollywomper]

From what I can tell finding a manual trans rig could be a bit difficult. However there were far more magnum manual trans in the Dodge Ram 2500s. So don’t forget to look there as well.

 

[Wildman]

From what I can tell finding a manual trans rig could be a bit difficult. However there were far more magnum manual trans in the Dodge Ram 2500s. So don’t forget to look there as well.

You'll find more Dakota's with a manual transmission than Ram pickups. When the time comes you can use an automatic PCM and get it flashed to a manual transmission.

 

[pc1p]

The recents discussion has peaked my interest in a 5.2 swap. For some reason a 318 sounds way cooler than a 360.
The power numbers are not exciting at all. However with headers and a mild cam what can we expect? North of 320hp? Can it be tuned or power chipped? The swap is not exciting for 240hp. But the compatibility with a tj may be worth the effort.

What is needed from the donor rig?
Engine, engine harness and PCM? Anything else?
Fuel pump?
Are the TJ fuel lines adequate?
Is all the wire splicing done just with engine bay harnesses?

For me, I'll take a 360 any day of the week and twice on Tuesday - at least for a 4x4. The torque curves, which somewhat close appearing on paper, don't match real world seat-of-the-pants feel. The 5.9L pulls hard, quick, and has a near flat torque curve in the RPM range where most 4x4's are driven.

Marty (UTAwesome) gets 300+ out of essentially stock rebuilds. It takes some machine work but can easily be done on even stock, cracked heads. The Magnum was excellent for the torque - Marty is good at squeaking out +400tq on factory stuff; here's a good read: http://utawesomeperformance.com/2/p...zTIgM2C9f-65PONryIMd-Wk560fmHm72_czluo5AWrnbI

Factory TJ fuel stuff is more than adequate. My factory 93 RC pump supported a 500hp/550tq 408 stroker without issue.

What @Wildman said on the year compatibility is accurate, so just find what you need and it is quick. The splicing really isn't that challenging, about 11-14 wires depending on what options you have and are keeping (A/C for example).

The Magnum "era" may be slipping by. At one time, you could get a running 5.9L from a truck for ~$600 running and ready to go. A quick clean up, gasket change, plenum repair, and plug and it was a quick way to add a lot of low end grunt that worked with factory gauges, fuel system, etc. Realistically if you had everything ready to go, it would be a weekend swap! But from what I've seen they have been drying up. The "golden years" of the Magnum were 96-01 and there are simply less on the road by the day.

 

[Gollywomper]

For me, I'll take a 360 any day of the week and twice on Tuesday - at least for a 4x4. The torque curves, which somewhat close appearing on paper, don't match real world seat-of-the-pants feel. The 5.9L pulls hard, quick, and has a near flat torque curve in the RPM range where most 4x4's are driven.

Marty (UTAwesome) gets 300+ out of essentially stock rebuilds. It takes some machine work but can easily be done on even stock, cracked heads. The Magnum was excellent for the torque - Marty is good at squeaking out +400tq on factory stuff; here's a good read: http://utawesomeperformance.com/2/p...zTIgM2C9f-65PONryIMd-Wk560fmHm72_czluo5AWrnbI

Factory TJ fuel stuff is more than adequate. My factory 93 RC pump supported a 500hp/550tq 408 stroker without issue.

What @Wildman said on the year compatibility is accurate, so just find what you need and it is quick. The splicing really isn't that challenging, about 11-14 wires depending on what options you have and are keeping (A/C for example).

The Magnum "era" may be slipping by. At one time, you could get a running 5.9L from a truck for ~$600 running and ready to go. A quick clean up, gasket change, plenum repair, and plug and it was a quick way to add a lot of low end grunt that worked with factory gauges, fuel system, etc. Realistically if you had everything ready to go, it would be a weekend swap! But from what I've seen they have been drying up. The "golden years" of the Magnum were 96-01 and there are simply less on the road by the day.

They are definitely high mileage runners these days. I did a samurai harness once. It wasn’t bad once I got started. Looks like the plan now is to find a Dakota bell housing and an AX15. Seems like a running magnum in a vehicle is easy enough, especially with an auto as most say trans is bad. Could have a Durango now for probably $500. Grab the harness and pcm from whatever engine I wind up with. Then have the pcm changed to a manual.
All the tj harnesses I find say 97-98 on them. So I’m trying to find out if there were any differences between the years.

 

[Wildman]

Just to add to this,
You can use an engine from a 1996 Dodge or Jeep just make sure to use the emissions for a 1998 and then it's still legal. And running a cat doesn't hurt your performance. Run a pre & post O2 sensor plus a tune from FRP or UTAwesome.

With the mileage being high on most rigs you're going to find now I'd do a basic rebuild on it before dropping it it. Pull it apart, have the block hot tanked and new cam bearings installed. Then new rings and bearings on the crank & rods.

The magnum heads have a history of cracking. Do all of them crack? Nope but it does seem to happen to 50-60% of them. So buying a set of aftermarket heads is a good idea IMO. These were the stock heads in the 5.2 I had in my TJ.

And as PC1P talked about the stock intake has a issue with the plenum gasket blowing out. Hughes Engines sells a repair kit.

 

[Gollywomper]

Chances are if I find a good running rig the engine will go in as is. Other than some gasket changes. Once the swap is complete I can focus on heads, cam and other HP stuff.
Finding the manual trans first opens tge door to more rigs as the magnum/manual is tougher to find than the autos.

 

[Wildman]

Chances are if I find a good running rig the engine will go in as is. Other than some gasket changes. Once the swap is complete I can focus on heads, cam and other HP stuff.
Finding the manual trans first opens tge door to more rigs as the magnum/manual is tougher to find than the autos.

I'm just gun shy after mine went tits up so quick. I had to have the automatic transmission rebuilt within 18 months of having the swap. And then I could never really get mine to run correctly and it always ran rich. It clogged up the first cat in about 30 months and took me a while to diagnose it. I'll be honest in saying I screwed up in having a shop do the swap for me because then I was lost when it came time to try and figure stuff out.


If you decide to do this decide what you are doing with the power steering before spending any money.

This is a stock Dodge power steering setup.

And this is a Grand Cherokee V-8 mount using a TJ style PS pump. This is one of those things I'd wish I'd known prior to so I could have bought the upgraded TJ pump from PSC. TONS more clearance.

 

[Wildman]

Also resist the desire to try and cheap out on things. Some people move the engine mounts back past where AA recommends so they don't have to get new driveshafts. But to do that you have to dent your firewall and you can't remove the distributor.
So put them where AA suggests and just get new driveshafts made.

This is how people have modified their shifters to clear the dash.

Second option

And if you decide to use stock exhaust manifolds get a pair of them from a 92-93 Dakota as they have a larger opening.