HEI or CDI?

The main reason I run HEI is cost and availability. I just run a "plain" 4 pin GM module, triggered by a Mopar breakerless distributor. I don't even run a special coil, just a Mopar stocker, and no resistor.
+1
I just run an HEI coil, since it fits on the same mounting bracket as the 4 pin module.