Depends on the engine.
Most of these trucks came with a V8, and its transmission is long. The 258 transmission is the same length as the one in the CJ-5 and Ford trucks. Big difference.
You understand that you are limited to transmissions from 4WD trucks, or 2WD transmissions that are converted to accept a transfer case using an aftermarket adapter, (ie Advance, Novak).
https://www.novak-adapt.com/knowledge/t ... ons/manual
The Ford NP435 from a 4WD truck may work in a J10, and possibly not in a Wagoneer/Cherokee due to fuel tank placement. I expect the Ford transmission has the long tailshaft adapter like other Ford pickups. This combo will be way too long on the back end for a CJ, but may be ok in the Jeep truck.
If you go to the Novak web site, they describe the various Ford truck 4-speeds. Their market is mostly short-wheelbase Jeeps and there are likely combos you can use that they do not address.
This is the 1980-on Jeep truck T-18 used with the NP208. All these trucks have V8s, except maybe some export models. This combo only appeared in the J20 1980 and later:
You can see that it is long. The front adapter is made for the FSJ with a V8, and is peculiar to V8 Jeeps only. This places the V8 engine forward and retains the shifter positions used with the six.
Pretty sure the rear adapter is the same as Ford from the same era. Conceivably you could use any Ford truck 4-speed from the era that came with a NP transfer case; T-18, T-19, NP435. I know the output spline on the above Jeep T-18 is different from the Ford, but your NP208 may match the Ford transmission. Something to investigate - the Novak site may cover that if you read the articles there.
More pics of the 1982 J20 T-18 here
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