I put a 92 4g64 in a 80D50. everything fit perfect, motor mounts, fan shroud on radiator, even the drive shift fit the 92 trans. 5speed. The wiring took me a week to make everything work together. Lots of solder and heat shrink tubing. had wiring diagrams for both. put fuel pump in tank, works great. I now have about 300,000 on it. I had the motor, trans and wiring harness, everything. I think the oil pan is different on the 4x4.