Your best bet, in my opinion, is to treat it as if it's an 88-91. Follow the directions that Scott posted earlier for doing a MPFI conversion. The pins are the same on the ECU. Wire up the motor with your wiring harness that's already in the car, convert it to MPFI, and buy an obd0-obd1 jumper to use your P72.
That's going to be the easiest and smartest thing to do.
That's going to be the easiest and smartest thing to do.