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. . . an embarrassingly smallish 4bbl . . .
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Specs for the carb on the '68-9 440 is 1.686" primary, 1.686" secondary, 1.437" primary venturi and an air valve secondary. That's about the same size as the high performance Holleys on Chevrolets that flow 780-800 cfm. If that is small enough to be embarassed about, those poor guys that can't buy a cubic foot of air probably don't even need to show their face. I'd like to have your measuring stick to convince NHRA to change some power ratings.
Dwight