Engine miss under load - ignition concerns

A PROPERLY working Mopar box should be fine. One problem is, I no longer "know" of anyplace reliable to buy good quality replacements

I'm big on HEI. Even with a stock coil, an HEI allows you to do away with the ballast, giving you more coil "juice."

There's lots and lots of threads on this, some guys have even put a 4 pin HEI module inside a scraped-out Mopar box for "originality"