Point gap is set as I indicated below. Turn the engine by hand slowly until one of the six bumps on the distributor cam is pushing the points open as far as it can. (little fiber rubbing block on the tip of the cam lobe. Nor use a .020" feeler gauge. (they come in a set that has thin blades from .001" or so to about .030" or so. (a few buchks, but needed))the gap of the points is correct when the blade slides between the contact surfaces touching both, but not forcing them open any. (it is a feel thing, and the blade must be parallel to the surfaces of the point contacts.) If it is perfect as is (doubtful) leave it alone. If it is narrow or wide, the stationary backing plate of the points must be loosened enough to move, and the plate adjusted to .20" gap. Not difficult, but touchy. Retighten and check gap again. There is one other test to do while the cap is off. Put the rotor on the shaft, and turn it by hand gently in the direction of rotation (CW) it should turn a few degrees and stop. When released, it should spring back to its former location. This tests the distributor centrifugal advance for operation, (not perfection, but that it works at all.) If it does not turn, or does not return (do not break the rotor, it is not hard to turn) the distributor needs to be rebuilt. It is beyoun you at this point. Good luck jim. Keep asking questions.
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