High Output Coil

Yeah and with multi strike, it's hard to lose spark due to a crappy tune,er difficult tune,in that range during which the multi-strike is active (usually sub-3000 rpm). I suppose that is why it is so popular among the big-cam crowd.If the first spark don't light it,there's 19 more behind it, and one of them will surely light it off.
The biggest cam I have run was the 292/508/108, and it was fine with the sq-top Accell. It says not recommended for over 6500.......but..... mine goes 7200 all the time.It's rarely hung out there for more than a few seconds atta time, so I think that coil doesn't know how fast the engine is turning,lol.

I had a Blaster on a stock 340, back in the 80s. It seemed to work ok.
I had an Accell round-can on a 340 back in the 70s. It seemed to work ok too.
I had a Jacob's CDI and E-core on my current 367 for a short time,until it puked. Switched to the Accell at that time, no difference. When I got my Jacobs back from the manufacturer, I left it in the box.That unit had cost me a couple of tow jobs, and I had lost faith in it.