Jon,
Thank you for the education.
I know this is an old truck site, but I didn't want to start being a member of a bunch of chevelle or camaro sites, just to see what I have in my '70 C50 grain truck. I know the motor, heads, intake are 1972 BBC chevelle camaro chevrolet by their numbers, but like you said, the carbs were different.
With that said, all of the sites I went to had the exact same info on carb de-coding for the Rochester. They were absolute and offered no exception. Which I obviously have with the numbers on my carb.
It was mostly for discussion, as I determined that the carb was not part of the original package, which I was hoping for, for when I part with it.
Site rocks,
BaconFarms