Are there any specific details i need to look for on the ECU?

Im on a small team and we aquired an AE86 with a SilverTop 20v in it. it has no ecu and the wiring harness is shot, so both would be needed. I was wondering how well the BlackTop ecu goes with the ST and how would you go about hooking it up. this idea came up when talking about the MAP sensor that c...