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Swapping coils fixed the problem. (Parts cars are great.) I meticulously cleaned and inspected the coil. It was dirty, and I could see the potential for that to cause problems. The only fault I could find was the cracked insulation on the low-tension wires. I also tested to see if there was a hairline crack or some other invisible leak by placing the coil near a ground source while the car was running and moving it around - in the dark. The only way I could get a spark to leap from it was to place something in the end and get it within about 3/16 of an inch from a ground. Kinda makes me wish I could Magnaflux plastic. I'm sure curious where the spark was going. I was wondering if the hi-tension circuit used one of the low-tension leads because it seemed possible that the spark was jumping between the low-tension leads.
It's amazing how much power one cylinder can rob from a six shooter.
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