I am trying to replace a 4.0 in a 2001 and having a hard time finding one. My question is do I have to use a 99-04 block or can I use an older on with the newer style head and assesories. I know the head it different due to the Coil pack but I don't see an differences in the block with a blind eye. Believe it or not the engine still runs even with a window now in the the number six cyl. I am doing this a for a friend of mine who is retired and limited on funds so I am trying to keep it down price wise. Thanks for any help I can get
87 YJ, 4.5 RE lift with monotube RE shocks, 33 LTB's, 258 w/4.0 head, HEI, and Weber carb, Header, Comp 252H cam, Dynomax, cat back and much more.......