6.1 Swap Won't Rev Past 3K HELLLLPPPPP!!!

I believe that the ECM is indeed looking for the downstream O2 sensor input, but it would throw a code if that were the case. Can you connect the upstream convertor O2 sensor to both up and downstream inputs? I would think its looking for a delta between the up and downstream and if its not seeing anything its in limp mode. You running cats? Sounds like you are in for a flash of your ECM or some sort of bypass. If you could regulate the 12V heater voltage off the 3-4 pins down to .45V (big *** resistor or a seperate regulated .45V power supply) and run that voltage back on the 1 or 2 pin (whichever is not ground) then you could fool the ECM that you are at stoich, but fooling the ECM on O2 levels messes with the duty cycle of the entire fuel injection so you are going to need some sort of plan, ie cats and the right sensor hookups. At WOT, these are not supposed to be even refferenced, but if your in limp, then itll never get to WOT.