[davepl]

My resistance wire was tricky - someone has replaced the last foot or so of it with yellow wire, so I thought the resistance wire had been removed when whoever did it installed HEI. But no, only the last foot. When I ordered the new M&H wiring harness I specified HEI so it came without.

Whatever you do, get a harness made for YOUR truck. Not bashing painless, they likely make a great product, but it's generic. Get the AAC or M&H one set up for HEI like I mention above. Remember you've got TWO harnesses in the front, one for the engine and one for the front (lights, etc).

Also remember that there are TWO little black fuses in the harness. Both of mine had caked for some reason and my ammeter didn't work.