You need a clutch that will fit the 92 trans. The pilot shaft bushing is the problem, I'm not sure when they went to a large tip on the shaft, mine is out of a 97 TJ and its 3/4"
The clocking requires a clocking ring to move the t-case up to clear the skid plate. Its actually easier to get a YJ or TJ t-case. Does your 87 have a 231 or a 207 t-case?
The skid needs re-drilled to accept the trans. mount.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...