Np435 Dana 20 or TH400 Dana 300

[Brimc]

I bought an 82 CJ7 with a swapped 360, trashed SR4 (no surprise), Dana 300. I need to upgrade the trans. I will mostly be driving on roads, but it will get an occasional beating. I know I would prefer the auto option, but right now cost is my main concern. I have access to an AMC TH400 and an NP435/Dana 20 combo used. I will rebuild everything before installation. Which is going to be the least expensive swap? I know I need an expensive adapter for the T400/D300 combo, and I will need an auto shifter, pedals, reverse light wiring, and possibly drive shafts? It seems like the NP435/Dana 20 setup should bolt right in. Not sure if the drive shafts will still work. Am I missing anything else on cost or work? I'd like to do the automatic, but it seems like a lot more money and work.

 

[Lumpy Grits]

WELCOME!
These are the folks I would call with those questions.
The Novak Catalog Gateway
FWIW: My son has a built 401 Interceptor in his '5' and the NP435/Dana 20 has held up well.
LG