The 2.5's used a hyd clutch the 6cyl used a bell crank and linkage. There used to be a kit for a conversion but I don't remember who made it. You might with parts Mike in Ca. you didn't say what you were converting to.
86 CJ7 5.7 vortec. 4L60,D44's,OBA,Air tank bumpers w/D rings detroits,4.88,35" bfg, mt's 9500ti warn
86 CJ7 2.5 detroits, OBA 4.56, air tank bumpers, w/D rings,9500I warn 31x10.5x15, Trxus
86 CJ7 bone stock, w/factory 44 never seen the dirt soon to be for sale
87 Wrangler also never seen the dirt.