87 was first year fuel inj, 86 was hyd clutch, z-bar bracket bolts to d/s top of frame under column frame should already be drilled for 3/8 bolts.. I've done the swap he's doing been awhile 73-80 are same and 81-87 are slightly modified the front bumper mounts are different, 81-87 uses all same cab mounts where older ones are taller only on rear of cab iirc. There were several small changes to trim, electric etc. the only major change made to the body in that run was the round fuel door went square and the wipers went from under the hood to their own panel along with different fenders