I have a 1996 Dodge Ram 1500 2WD with a 3.9l V6 wanting to swap to a 5.9l out of a 1995 Dodge B3500 Van. I have a complete donor vehicle. Is this possible and if so what all will I need and have to do to accomplish this. Thanks in advance

 

PCM, Wiring harness, possibly transmission

The big hurdle with your suggestion is the Van is going to be OBDI and your truck is OBDII. Simple enough to swap the V8 over to OBDII but that's going to leave the trans, pcm and wiring from the fan unusable for you.

The van should be a 46RH your truck would be a 46RE I believe. The trans might be switch over, but IIRC the 5.9 has a different torque converter

with some wiring schematics and time I would assume you could graft the needed wires over to the harness. Possibly connector changes or swap sensors over? I haven't dealt fully with an OBD I-II swap, but it seems Dodge changed connectors ever 2 years anyway so odds are good something wont match up

 

The only real difference between the wiring for the 8 vs. the 6 is two injectors. Simple matter to just add those wires, then flash the PCM for the bigger motor.

Moving this to Second Gen Ram section for ya.