I just fitted an LS3 (E38 PCM) into a 67 Camaro with a TH400. Because I have a drive-by-wire throttle body I was thinking of hooking up the TH400 kick-down from the ECU using the aircon disengagement setting. The theory is that I can set the ECU to trigger the aircon to disengage at WOT and use a circuit to activate a relay for the kick-down. Not even sure if this will work. My queston is which pin on the E38 provides this output? I have seen 3 on the pin diagram which are aircon related - J2-14, J2-43 and J2-18. J2-43 "AC clutch demand" seems the closest.