by Seth G Wed Nov 26, 2014 1:03 pm
FIZGIG, I would keep the GM module and the coil, TFI?, and replace the distributor with a DSII distributor. It will fit right in and with that coil or a TFI coil you will have any benefit the HEI unit has. Also you should be able to reuse your old gear and lose the risk of cam gear failure. Afaik, the HEI will not fit in the doghouse without modifying it by cutting a hole and boxing in the dist where it comes through the side of the doghouse. You could also go with a new standard style high power coil if you get the right one you won't need the resistor anymore. And I believe the TFI coil also does not need the resistor.
Also, I'd take a close look at the distributor you already have and verify that it isn't a DSI. The first era of Ford electronic ignitions looked exactly like points distributors from the outside, but they are otherwise identical to DSII units in operation.