I run a 351W in a '69 coupe, right now, with full-length headers and a 2-barrel holley, stock cam, and pretty much stock everything, it gets around 14. We are putting on a bigger cam, a 750 cfm 4-barrel, so it will probably run about 11 or 12 then. But like that other post, that's not too bad for a car running 375-400 horsepower.
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