Hey Koop, there is so much info on the HEI system out there that I don't even know where to begin. They (HEIs) are the stand-by of most street machines and many work trucks. Your cap, if the distributor is original will NOT have the coil in the cap. The old original caps are getting hard to find so if that's what you have, I'd swap over to the coil in cap type. For your truck, run a switched 12ga wire from the ignition switch. Don't use anything else for for power. Try both vacuum ports on the carb to see which one the HEI likes. Use AC plugs and set the gap .045.
That should get you running.
best wishes,
Les
