Ight looking at buying an 89 roller that was setup for carb.....I have a 91 GT complete that i was gonna swap EFI everything over from. any compatibility issues here?
I take it you're taking the 91GT stuff and putting into the 89?? In that case...Injector harnesses and the main harness should be the same, however 89 Mustangs don't have airbags, so you simply just won't transfer the air bag sensors over.