4.0L In 86 Mj

[misfitmechanic]

Over the last couple months ive been doing a 4.0L swap in a 86 MJ 4x4 long bed. Ive got a 91 xj 2 door 5 speed as my donor vehicle. Today I tried to install the engine, and to my dissmay it wouldnt fit. I had another quick look at the donor and it has a small extension to the firewall clearance to clear the left rear corner of the engine. I had a good look at both vehicles and cut the lower half of the firewall out of the xj and I'm going to section it into the mj. Has anybody ever done this before? Rather than this and the need to mod the rad support to fit the 4.0L rad are there any other big snags that I'm gonna incounter?? Ive pretty much got all the wiring figured out and know I'm gonna have to put a fuel pump in the tank.