THe HEI uses vacuum to advance the distributor (or at least my old one [on a Chevy] did) Have you removed the cap / rotor to see what lies beneath yet? Maybe to run on a Ford it needs to be converted to use the EEC for advance..?
Yeah the EEC is part of the computer. I am not up to par on swaping a chevy distributor into a Ford but I can try to help out. I can search online and report back what I find