A friend of mine bought a 90 Civic DX with a ZC engine swap. He asked me to check the timing, and I noticed it was 0* TDC at Idle. I tried to adjust the distributor but at max, I can only get 10* BTDC. His ECU is a PM6 (Si ECU). I reading that the 88-89 Integra ECU is compatible as well as a ZC ECU(PM7). Can anyone tell me if the Integra and ZC ECU the same? TIA JW