Originally Posted by mick53
Just so I can play along is this what we are talking about? NOS 292.

Yes- - - -the upper chamber pumps fuel- - - -the lower one assists the manifold vacuum, especially when the throttle is opened and normal vacuum drops too low to operate windshield wipers, brake boosters, or other vacuum powered accessories.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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