my 77CJ5 304 had a prestolite. that prob doesnt help much tho
if teh distributer says "motorcraft" on it, then its NOT a prestolite
the prestolite also has that strange gold box on teh passenger side fender if I recall, and the duraspark has a silver box with fins on the drivers fender, that most likely says "motorcraft" "amc" or "wells"
if you do a search for duraspark, or ignition uprgrade, youll get lots of pictures and info
The prestolites used a plastic vacume advance while the motercraft used a metal one.
bandhmo
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