Dual point distributor question

mvh said

I don't think you need a scope for this. If you can feel the shaft wobble, that's too much.

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Read the book. They show 2* on a dwell meter and with the spring scale play test, .006" of side movement. I can certainly feel .006, so it's a matter of perception. These are bushed, not ball bearings. I have no idea what the OP is experiencing, or how hard he may be pushing.

I did not say you MUST use a scope, only that it is a handy way.

Also don't forget the possibility of play in the vacuum advance system. The dual point dist I have seen have a ball bearing advance plate, and if any of that gets sloppy you will also have trouble. On that note, do NOT forget to provide a ground jumper to the advance plate, because they have a poor ground through the bearing.