ok.... slight update. The car is back together, running the 2.5 ecu and the IAC off the 2.5. Topping off all the fluids and attempting to let the car idle to fill the coolant, etc. Not happening unless I stand over it and keep it revved by hand. It seems to be a little better, than I was when first turned over, but not much. I haven't been brave enough to take it out on the road, due to the rough idling. Been through the grounds, plugs, sensors, and everything else I can think of. No CELs.