you must remember you unplugged the converter plug. The TCC is not sending a signal to lock at the incorrect time , and the vale is not stuck open our it would steal lock energize or not. I don't believe you have a couch problem.Unplugging the torque converter lockup solved it. No more stalling when transitioning from stopped to rolling.
Right now the IAC is 18 in park at hot idle. TPS at .44 and seems to like it.
I have noticed at WOT every now and then the millivolts will read low (.200-.350) for a split second, and will pull 2-3 degrees of timing. It doesn't do it every time though. Most WOT pulls show O2 voltage between .750-850
Should I mess around with the MAF translator and see if I can richen it up a little under boost?
Will millivolts may be correct it pulling timing low millivolts and Knock = timing retard.
Scooby said the first place I would go, old fuel dirty injector are good candidates too. one dirty injector can be a hard thing to troubleshoot.
im not real up on translator but not sure you can make adjustment with a old TT chip in the translator.