Hey Guys Heres the deal I got a 1990 GS with an b18a engine in it, and I just bought a totaled 1993 GSR with the B17a motor in it and i want to switch it over, and i have a few questions. First do i need to use the p61 ecu or will the ecu in my car work. Next one is do I have to rewire the distributor or just plug in the harness that is on the gsr to my cannon plugs on the firewall and just wire in the vtec. And Do i have to remove the fuel injector resistor pack on the gs. I just wondering what i need to do to move this over or would it be easier to move the whole wiring harness out of the other car and use the p61 ecu. And I imagine the gsr will have a four wire o2 so that will have to be changed too. I don't think my plugs on my ecu will fit on the p61 because the p61 looks bigger. Anyway any info would be a big help.