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Prosport not to high jack your post but do small blocks have the same problem, my timing seems to bounce a little ? can this trick be done on the small blocks ?

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Yes it will do the same thing.

Somewhere I have one of the collars that Ed Hamburger used to sell for Mopar distubutors back in the 70's

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Is the SB distributor shaft the same diameter as the BB distributor shaft?
There's a Grainger store nearby and, since the company I work for does a large amount of business with Grainger, I get things from there at a discount.