Steph0250.....Welcome to the Jeep Forum, tons of good stuff here for your CJ5. SlikRic already provided a link to the best thread on the forum to answer your question.
Do you already have a '91 4.0 to install? The reason I asked is, one needs to be sure to grab certain items, mainly electrical, to make the engine work. Hopefully you already knew that.
Good Luck and post some pictures of your rig when you get time.
'86 CJ7, 258, Carter BBD, Nutter'ed, TeamRush'ed, T-18, Twin Sticked Dana 300, D30 Frt-Pwr Lok L/S-4.10, AMC 20 Rear-Mosers-Detroit Locker-4.10, 2.5 BDS Lift, 1" Body Lift, 33" Wild Country M/Ts, Black Spoke wheels
'45 CJ2A, L134 Go Devil, T-90 Tranny, Warn O/D, T-18 T-Case, Dana 25 Frt, Dana 41 Rear, 531st CJ made
My 401 build: [url]http://www.jeepforum.com/forum/f8/trapshooters-401-build-1338277/[/url]