Is this an original AMC 4.0 inline 6 engine

[Wcastro]

I purchased my jeep years ago as a 4.0 Jeep but was curious if this was an original AMC engine. Not sure what the codes mean. I posted two picture as a reference.

 

[jjvw]

AMC stopped existing in 1987. The last AMC branded Wranglers were YJs manufactured in 1986 until the buyout. After that, everything became Chrysler.

Your engine looks to have been produced on the 206th day of 1998, which suggests that it is original to your 1998 TJ.