So I got an 74 block bored .30 over not sure what heads are on the block. I'm goin guess stock 74 heads I have a edelbrock victor thats been turned into an efi manifold. now I'm stuck on the wiring. what are people running I found a painless for an 87-93 mustang is that the wiring I need. plus how hard is it to put in what mods do I need to do to the wiring.