Quote:

I think you will find that almost every carb from 66 back that was installed on a non performance application such as full size C bodies and others did not have a secondary air valve.



Hmm, the 413 I had my AFB on was stamped HP and it had no weighted air valve.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.