im doing some research into how the 60's carbs were calibrated vs. the 70s carbs for emissions. i know without taking them apart that 60's carbs both 2 and 4bbl rochesters were way more generous on the fuel calibrations than the later carbs--almost to the point of not having to modify them much to get them to run good with larger cams. im going to get a baseline by measuring a factroy stock 66 pontiac 2gc and a 67 pontiac qjet for my future carb calibrations.
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