4" suspension lift

I recently bought a 4in Currie lift and I want to buy some Rancho rs5000x shocks to pair with it but I wasn't sure what size to get. I was reading up on forums and learned you should cycle your suspension to find the exact shock length you need. So I was wondering, should I install the lift...

I just bought a new set of 33 12.50 KM3's but want to go a little taller. Do you think a 6" suspension would look odd with these? I'm just looking for opinions guys. I know a V8 sounds better than a 2.5 - 4.0 swap but this is my first build and I'm going for less expense since i'm putting a lot...