HEI in Mopar ECU casing

fstfish66 said
... am i reading correctly,,MSD makes a module thats hotter for the GM unit being converted on this topic?

MSD sells the GM 4-wire HEI module in red color, with their logo. If you prefer yellow, Accel has that. Don't know they are better or even come from a different factory, but you are assured to pay more than a standard Wells PN.