re: belt drive drawing "In the mean time here is the bearing requirements for a belt drive."
Would it not be better to devise an accessory mount for auto conversions that mounted like an alternator, had appropriate bearings and pulley, tensioner arm etc, then on the back side had whatever flange mounting requirement needed for something like a vacuum pump?

Or, an adapter flange to put on backside of a hybrid alternator like the Chevette that has a small splined shaft already on the backside of it to drive the smog pump?
Chrissi

The smog pump has the required bearings. One reason it is heavier than the
A/C vac pump. When you add this to the vac pump you add a bit of weight of course.

Paul Lamar

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