I have used the E-Core coil with the stock mopar HEI conversions, works great. They run the full 12 volts and they run cool.
Here are some E-Coils that will work. Nice 2 tabs, flat spade positive/negative posts for easy wiring.
View attachment 1715953655
Ebay:
View attachment 1715953656
Same thing here but "Red" more money:
View attachment 1715953657
Same nice flat spade + - posts.