Okay, so after I did the fg to ba manifold swap, once my car gets warm, it develops a rough idle. Scan tool is no help, it does show the oxy sensor graphs going spastic at idle, but fine as soon as I touch the pedal.
I've switched back to a ba throttle body with an adaptor plate, just to make sure that wasn't my problem. Still no difference. Right now I still have the fg tmap sensor wired up.

My question is, do ba/f tmap sensors use different resistances and values to fg tmaps?
Unfortunately it's not a matter of swapping them over, as the plug is different.