Hei vs points.

I recall a youtube which does more exacting tests, of points, HEI 4-pin, and GM LS coils, I recall. He videos in the dark and such. The LS coil sparks hardest. The advantage is you aren't sharing a coil between cylinders, which definitely helps at high rpm so more time to charge-up the coil. As shown, it is easy to jump a spark in the air (inches), and even easier in a vacuum (yards), and not so easy at high cylinder pressures, which is worst at WOT with a turbocharger. I doubt that with points you could set your spark gap at 60 mil, like in a modern engine, without misfiring when trying to accelerate on an on-ramp.

Yeah, that's true, it doesn't even have to be a system as new as LS coils. My sister had a 1994 Oldsmobile Cutlass Supreme with a 3.1L, this engine calls for 0.060" plug gap when new. 115k on the original spark plugs (don't ask why it went that long), I noticed it had a slight misfire at idle, but it seemed to drive fine, so I go to change the plugs (still kept the original wires!) and they were at 0.110" gap. This is a car with a crank trigger and 3 coils where it sparks two cylinders at a time. I also pulled an even worse plug out of a 2003 Honda Accord and that only had very slight misfiring.

When I did my EFI swap, I did install the LS round coils, the spark is certainly excellent. I don't know how much of the extra idle smoothness is sequential injection but I'm sure the ignition helped out a lot.