I did the same thing to my '73 FSJ pickup. you will need the following:
1. The manual transmission. SM420 and SM465 GM 4 speed trannys are always a good choice for strength and gearing.
2. The bellhousing. Unless you want to use a stock Jeep tranny, you'll need one from a company like Advance Adapters
, which can also supply you with the needed transfer case adapter.
3. The transfer case adapter. You'll need another one, unless you keep your New Process case, and the new tranny was equipped with a New Process/New Venture Gear case.
4. A flywheel. The flexplate that came with your auto won't work.
5. The clutchpack. I like the Centerforce series
, although you could use a factory pack for your engine if the sline count matches.
6. The pedal assembly INside the truck. The assembly should be the same from 1980 to 1991, although I'd try to stay as close as possible to 1991. A 1987 J-series pickup should work. (Find a V-8 '87 pickup with a manual transmission, and you'll have almost all the parts!!)
7. The clutch linkage. It's your preference: hydraulic (modern), cable, or linkage. If its hydraulic, grab it from a full-size Dodge Ram pickup, '88 on. Otherwise, fabricate it.
Last, check the driveshaft length when you're done. the manual gearbox is shorter than the auto, so you might need a longer rear driveshaft. If so, grab one from the junkjard truck, or call Tom Wood's Custom Driveshafts
for a price quote. Or find a longer truck, like a Ford or GMC crew cab.
Hope this helps! (I went the junkyard route, by the way.)
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