Stewart, have read the many responses and opinions of the guys. To answer your question, in my experience w/ flatheads it takes very little time to "cook" a coil. I did one in my KL welder truck in no time flat. ( too many beers that day, not paying attention). You can get the adaptor you seek from Mac's antique Ford Parts in Lockport, NY to use a more modern stle 6v coil. The diver's helmet style dist. is a piece of crap as far as I'm concerned, that's why Ford ditched it. Tempermental at best. NOS coils of this vintage are unreliable as with anything old. If using the original, must use an external resistor to reduce voltage to approx 3.5v. If you buy a new stlye 6v coil, most are already internally resisted to avoid burning your points. No.1 reason Ford flatheads run like shit is because of distrubutor/coil problems. Fuel+air+spark= running engine. Leave one of these out and you have zip. If I were you I'd use your dist. as a boat anchor and purchase the 2nd type "crab" dist. that utilizes the external type coil as on CMP trucks. The location of the coil on the diver's helmet lends itself to overheating of the coil as well. Hope this helps, and by the way, does the wife drive the carrier too?
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