Originally Posted by Blazin72
I haven't looked inside the distributor but my dad is saying there is a magnetic pickup under the rotor.
That is a plus. Must be a duraspark II (very good) .probably no computer of any sort on board. I would be looking real hard at the tach.
You could probably just unplug the Instrument panel to test it out.
Unplug it and drive to see if the trouble clears up.
Those tachs are fed right from the - neg side of the coil,one of the two green wires on the neg side,goes to the tach