Wiring questions

Depending on what company you use, they have ecu's and harnesses available in kit form. So, for example if you were to order the mega squirt kit, you would not need the factory ecu. You would not need a separate ignition box. As 1973B'cuda said, they need to know what trans you are using to give you the correct system. If you were to use the modern trans also, it is computer controlled. The kit you buy would then control the modern trans, too. Chris at Hotwire Auto is fantastic to deal with. I have used there product.