I installed a 99 5.7 vortec from a 2500 chevy pu. and used the factory harness. O could never get it to run, it would start and immediately die. What i found out was that 98 up has the anti theft in the computer. And I would have to have the computer re-flashed. What I ended up doing was get a computer and wiring harness from Howell. If I remember they ask where I was going to mount the computer and made the harness to fit that. Went together easy and looks 10 times better that all that factory junk. I was able to use the the factory in tank furl pimp. I didn't think to take any pic's I cut a hole in the top of the tank and made a collar that had a slot so I could slide it in the tank. I first marked the holes and drilled them so they would match up with the factory fuel pump, made a gasket and screwed it all together. I still have the factory wiring dia if you can't find it on line.It.s a 5.7 vortec in 99 5.3 and 6.0 are Gen III
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.