I'm doing a swap on my 96 GSR with a JDM GSR. My question is... Can I just use the USDM wire harness that I have and put that on the JDM motor? Or will there be any modifications that I will need to do? It's an OBD-2 JDM motor

 

I've learned that I should use the usdm motor...But is there any mods I will need?

 

get yourself a USDM harness from the equivalent motor and you'll be fine.

 

I also have the jdm obd-2 ecu with it. Do i need to modify anything on the ecu or the harness?

 

It should work without modifcation since it is the same obd type and same car/engine