Originally Posted by theorrminator
A V8 is generally longer than a 4 cylinder so everything gets shifted back. You will probably have to replace the tranny, maybe even the transfer case, and the drive shafts will probably have to go as well.
You move the engine forward of the stock location.
There is more than enough room to leave the transfer case in the stock location.
One of the hot setups on 2.5L YJs is to put a Klune V box in.
You shift the engine forward ~6". Still plenty of room.
The D30 will live up to a V8. Heck the early cj5 crowd run V8s with the D27 which is weaker than the D30.
It would be an easier swap to put a V6 in it. A Buick 231 or a GM 4.3 makes all the power you can want in a Jeep.
My cj5 has a V6 in it.
I will one day place a Mopar V8 mill in my YJ though.
But if it aint broke, dont fix it.
You would be way ahead of the game money wise to swap your gear ratio for 4.56s or 4.88s.