Coil voltage

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.
So I can't just add that coil and bypass the ballast? I'll have to do an HEI conversion?