I've searched... and I've read many many write ups on this, and I'm sorry for having another on here, but I'm extremely confused right now...

I'm swapping my GSR engine, which is OBD2, into my RS chassis, which is OBD1. I'll be using a P72 ECU.

If I'm right, my engine harness will plug right into the chassis, but I will need to wire for VTEC, knock sensor, and IAB... everything else is plug and play.

That being said, I just need a little help as to which pins I need to work with; below is an OBD1 pinout; I've never done a swap before, so please bear with me...

What pins will I be using here?

**Also, will I be able to use my cluster from my GSR, or will I need to find an OBD1 cluster?

 

Will I just need to wire into A4, A17, A20, D3, and D6?

Also, would it make more sense to just use my OBD2 ECU with a jumper harness?

 

Yeah a jumper harness would be nice. You have a OBD2 P72 right?

 

I have an OBD2 GSR ECU, but I was planning on buying an OBD1 GSR ECU so I could plug it right into the stock harness, unless using a jumper would be a smarter idea.