I need 12v
You need to modify the ignition system so that it is a type that WILL run on straight 12, or else add a relay from the IGN2 so that it only jumpers over to the supply side of IGN1 during start
The DIFFERENCE is that originally, IGN1 supplied "straight 12" only in run to the ballast resistor. It goes "cold" in cranking, so your EFI would be dead. But the IGN2 jumpers power to the coil which puts the ballast resistor in between the two (IGN1--IGN2) So you need a way to get that IGN2 over to IGN1
Only "easy" way I know would be a relay.
My solution would to not use a relay. Replace your Mopar box with a GM HEI module, and eliminate the resistor.
I think Greg drew up this really neat diagram from my henscratch LOL
Many guys upgrade the coil but I did not. Used the Mopar dist and factory coil
You need to modify the ignition system so that it is a type that WILL run on straight 12, or else add a relay from the IGN2 so that it only jumpers over to the supply side of IGN1 during start
The DIFFERENCE is that originally, IGN1 supplied "straight 12" only in run to the ballast resistor. It goes "cold" in cranking, so your EFI would be dead. But the IGN2 jumpers power to the coil which puts the ballast resistor in between the two (IGN1--IGN2) So you need a way to get that IGN2 over to IGN1
Only "easy" way I know would be a relay.
My solution would to not use a relay. Replace your Mopar box with a GM HEI module, and eliminate the resistor.
I think Greg drew up this really neat diagram from my henscratch LOL
Many guys upgrade the coil but I did not. Used the Mopar dist and factory coil