Chassis is a 96 auto that had an f22 non vtec, bought an h22a with auto trans, wanna keep it auto, I have both a 37820-p13-n50 and a Other,37820-p5m-n51 ecu wondering which one I need? Also wondering about distributor wiring, Iab, and vtec pinouts. Any info would be extremly helpful, just wanna confirm what I think before I fry one or both ecu's

 

You can do the P5M which I believe is a OBD2 ECU. It should just be able to plug and play; since, both the ECU and Car are OBD2. I'd keep it that way for simplicity.