68_Fbird - I do not KNOW the answer, but will attempt a "swag"!

Generally speaking (and probably true for this unit), a factory service replacement would have sufficient idle fuel for the largest demand, and would then be a little "fat" on the others. The idle system for a family of engines can normally be adjusted with the idle mixture screws. The main metering circuit, likewise, would be calibrated for the maximum demand. The carburetor would then function (with less fuel economy) on the other engines.

This same theory is true for difference in carburetors designed for engines with automatic or manual transmissions. The carbs designed for the automatic will be from 1/2 to 2/3 size richer in all vacuum ranges than the carb for the manual transmission. Thus, one can normally use a carb for an automatic on a manual car with slightly less fuel economy; but trying to use a carb designed for a manual car on an automatic will result in lean issues.

I would NOT want to use this particular unit with a ram air camshaft.

We have specs up to and including the 1974 model year. I believe this carb was released in 1977. We have no specs on it.

Jon.