[65-72 chevytoys]

Thanks for the help guys. I will go check tonight after work and get some more info. But after checking the original diagram it seemd odd that the yellow wire that is no longer needed was connected to the Battery terminal on the HEI and hanging loose on the other end. I think this is the problem, no power to the iginion or coil.

Jay after looking at your modified diagram for the HEI swap the orange/purple wire should now connect to the power terminal on the HEI correct?

Thanks for the help so far, I will take a look after work.