96-97 wiring and ecu in 1990 car
 

Hey guys, just bought a car for parts. It’s a 1996 car/engine with full bolt ons and fully tuned ms3 ecu. I have a 1990 car with 1995 motor swap, but still has the 1990 wiring. My question is: is it worth to swap the 1996 sensors/wiring harness and ecu in the 1990, or should I just sell the ms3 and by a 1990-1993 plug and play version?
I tried to search on this subject but didn’t find quite the answer I was looking for...
thanks!

Ben