Issues with 340 distributor

I would never call an HEI an upgrade over a good ignition system. I don't care who does what to it.

DUI got in the poop years ago when they claimed their HEI produced more energy than a magneto! I actually called them but we could not have a civil conversation. Eventually he was sued (or was served papers and forced to stop lying) and they don't say that any more.

To the OP, stick with what you had. Just my .02 and it's worth exactly what you paid for it.