Okay I had a D16y7 that ran off of a manual p2e ecu, I recently swapped in a D15b7 with a manual Po6 ecu.

I have the wiring harness for both, I plan on running the obd2 wiring harness from the D16 with the the D15, but I need to know what conversion harness to get?

Either a obd2a to obd1 or obd2b ??
What is the po6 ecu? obd2a or obd2b

thanks for all help or advice