what's up, I have a 1997 LS Integra and the car is currently running a chipped p72(gsr) ecu. It has a rev limiter past 10k and I don't want to eventually miss a hard shift and over rev so I bought an used P75 ECU(37820-p75-c05) and apparently it's a obd2b plug and the car has a obd2a plug. Which plug do I need to fit the p75 I have? Will it actually work for my engine if I can get an adapter? And which car did this come off of anyways? The guy who sold it said it would fit bolt on but nope, looks like im gonna have to find another one.

Thanks for the help!