All, thanks for the response's . P.M.I. USA, thanks for the awesome Qjet tech document!.
My car is numbers matching EXCEPT for the carb, it's a '75 vintage Pontiac. I'm either going to find the correct carb, or restore this one.

I'm not sure that when the carb was swapped, that the original internals from the '68 were re-used (jets, Mrods)...knowing what is supposed to be there helps

FWIW, the car runs perfect...so I'm hesitant to change anything...

Thanks again for the responses!
Mike