Some ignition questions

Near as I can tell, coils for HEI are not critical. Maybe that figure was minimum. I've seen guys used all sorts of coils with 'em. Even with a stock coil, you get more / hotter spark, because the HEI can modulate dwell time, and of course "no ballast."

Also, a "proper" (don't know about imports) HEI does NOT draw coil current with key on / engine stopped. This could save both a module and a coil.