Just replace them all.
No it will not.
No, the 1996 has an electric governer. While the 1994 has a hydrauilc governer.
where is the fuel filter located on 1996 dodge ram 1500 5.9L
1500 or 2500?? 6 lug or 8 ?
Where is the brake light fuse found on a 1996 dodge grandcaravan
Possibly, but you will run into computer, sensor, and wiring differences. It would be easier to get the proper engine.