Ok, pulled out the engine from the 86 turbocoupe today and the engine from the 88 mustang...man, what a day so far. after dinner I'm going to go through the turbo engine and clean it up and then put the brackets, etc from the 88 engine on it before dropping it the 88 tomorrow. Um, the fuel injection harness and all on the 88 has completely different plugs than the one from the 86...I can swap the 88 fuel injection harness onto the 86 turbo motor?? the o2 sensor from the 88 is 4 wire versus 1 wire from the 86 turbo engine...swap the 88 o2 sensor in place of the 86's 1 wire o2 sensor?? thanks guys, that's about all I've seen so far that's got me sorta confused. ecu wiring comes tomorrow oh yay. p.s. I'm going to completely re-gasket the turbo engine, new vacuum lines, etc, new injector o-rings, etc. Also, I've got a set of brown top injectors from an old project (honda) from a turbocoupe in my toolbox. If my engine does only have the 30lb'ers in it, can I just drop in the brown tops without worrying that the ecu will not take kindly to them??