I will be doing a cable throttle LS swap in my 1995 F250. Possibly using an OEM computer, on the fence about going Terminator X. I understand that I can use tunerpro and LS droid with an OBD Link LX to turn off VATS/CATS/ ect.. But I still want the OEM computer to run the gauges, ABS system, SRS system and aircon. As well as the in tank fuel pumps ( I will have the GM system trigger a frame mounted pump to carry the fuel pressure to 60 PSI ).

So I have to trick the Ford ECU into thinking that the engine is at least running. My thought is to use a tach output from the LS engine, into pin 56 of the Ford ECU which is the PIP signal. Both types of signals are a square wave 12v signal so it should be good enough. I don't have a tachometer in the dash.. This should work right?