[Paulporsche]

I had this happen recently on a very hot day to my 77, which has an 80 engine but still uses a breaker point distributor. I did two things: leaned my mixture slightly and reset my points. The problem went away the next time I used the car.

I subsequently switched to a Pertronix ignitor in place of the points, and replaced my sparkplug wires, distributor cap and rotor. I haven't driven the car much since I did this, but so far I haven't had a recurrence of the problem.

Why not look into the easy, obvious stuff first. Check your ignition components, including your point gap. If this doesn't work you can move on to some testing.