NV3500 in my 74 Duster?

I was going to do that swap also but had trouble finding that trany so ended up going with an ax-15 out of a 96 dakota 3.9 v6 as another option. They are out of the 94-2002 dakotas and rams which i had no problem finding, just a medium duty trany, step down from the nv3500 and the bellhousing is a separate piece compared to the nv3500 which is integral. Cheapest 5speed swap ive done, even used the 3.9 flywheel and i Have it in my 72 swinger; 318 mild build with 3.25s in the rear and for 2 years after the install and driving it like a mad man i still have no problems and its a daily driver. Im pretty sure someone did that nv3500 swap if you still wanna go that route, hopefully they will chime in to give you more info on it!