Some time ago I asked here about low dwell readings, on what was supposed to be a fairly recent rebuilt. It was suggested that the lobes on the distributor cam may be worn. Also recently found the bushing is somewhat loose. Unfortunately I missed a chance sometime back, to get a N O S distributor. My error..

Questions; 1) How close do the point settings have to be to get proper readings? I recently reset them twice. Best reading is about 21 deg at about 1500 & as low as 16 at idle. (the engine seems to have a constant miss at idle)

2) Does anyone know what the dimensions of a new distributor cam were supposed to be?. Unfortunately, in western Canada there is only one rebuilder as far as I'm aware. And that's where this "dud" came from. A friend suggested going to a Pertronics unit.

3) How successful would that be on a defective distributor?

4) I have a 55-56 distributor on hand. As a check, would the cam lobes dimensions be the same?

Any help appreciated. Thanks.

Paul