One last question,
With an HEI on my engine, what should the gap on the plugs be set at?

I currently have them at .035" as that was the gap GM recommended for the car that the distributor came from. I'm asking due to I pulled the plugs to inspect and they appeared to be running cold. I have Autolite AP26 plugs.

If at first you don't succeed,
then read the directions and try again.