Okay, i have an 87 350 tpi, and it is running on an 87 305 prom and injectors. I have had no problems and the car runs great. I originally had a 2.8, but swapped out for a 5.7. The ecm was bad, and changed that, which by the way came with a 350 prom, but it has vats. i was hoping to try a 350 prom to see if there was any real gain in performance. the problem is having vats, the 350 prom in my 87 computer will not fire the injectors. is there a way to get the vats 350 ecm to work on a car with no vats whatsoever