Just putting it out there...would a complete interior like dash, door panels and seats from a 2001 Ram 1500 fit a 94-96 model year?

 

Not really. A lot changed in 98, Seat belts are different, I think even the floor where the seats mount is different, also, the dash communicates in a completely different manner.

 

I've seen pics of it done, but would probably be easier to swap a newer cab onto the frame. There's the wiring, HVAC system, mounts, etc. But anything's possible. The cab sizes never changed but everything else was tweaked throughout the years.