I just went over everything again on the pinouts for each gen's ECU, and assuming everything else swaps over, the only things I'm unsure of are:
ST185 ISC Valve connections (RSC and RSO) to ST165 ISC Valve connections (ISC1 and ISC2)... which goes to which?
ST185 OX2 connection (Check connector, assuming for O2 sensor).. does it connect to anything?
ST185 VC connection (Sensor power source).. just hook this to switched power (like the +B connector)?
ST165 E22 connection (sensor ground).. does this go anywhere?
ST165 FPU connection (Fuel pressure VSV).. does this go anywhere?
ST165 VS Connection (Air flow meter).. should be the last one that I can't find a connection for on the 185 ECU.
Other than this stuff, is there anything else crazy that I would need to know? What did you do about the fuel pump relay and resistor, or does just swapping the connections over and using the stock 165 harness take care of this? which, if any, sensors needed to be swapped over? Did you have to swap any plugs on the engine side of the harness? Thanks again, and sorry for all the questions
Hopefully once all this is done, I'll be putting together a writeup on how to get it all done.