Dual point distributor ID question

My 67 273 is a CAP car.

The book says 5 ATDC initial.

I have mine set to 0. The centrifugal and vacume advance comes in so fast that it works well.

I also have the green timming off delay devise set so it is in operable.

That is something to check, if you still have it, that it is not leaking internally allowing manifold vacuumed the the advance can.


My stock single point dist had an issue with the dwell dropping off, due to the vacuume advance moving the breaker plate, so much that the engine would miss fire at 1200 to 2000 rpm in Neutral.

I recently bought, refurbished, and installed a Prestolite dual point. Due to the breaker plate design the dwell remains the same regardless of vacuume advance and no more misfire.

Be sure the ground wire from the lower breaker plate to the upper plate is intact. Otherwise the ground path goes through the ball bearing in the center of the breaker plate