I had the same problem about 4 years ago. I changed out the distributor and
that solved the problem. It was a worn out bushing that caused a slight
wobble in the shaft. This in turn caused a stumble at low rpm. It showed
up with Pertronics because of the close tolerance on the pick up of the
signal.
My advise is to borrow a distributor from a fellow sixer and see if that
solves your problem. if It does, then you have to decide whether to buy a
new one or rebuild your current distributor.
John
74 TR6
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