I have to tip my hat to Jon over at the original Carb Shop in Missouri. (not to be confused with imitators)
He spent considerable time helping me with my project and actually had, in stock the correct NOS Carter AVS carb (1969) for my boat restoration. He knows more about these carbs than anyone I have met thus far, and is very friendly and helpful.
It was a pleasure to do business with such a knowledgeable Gentleman.
Bowties are for Pee-wee Herman. "Chevy": even the name sounds cheap, but not as cheap as your Pontiac will be with an LS transplant.