I just removed this from a 66 GS so I could put the original carb on it. The car ran great with this carb and actually had more power but I wanted the factory carb on it. It is a Carter Competition series 9755S which I believe is a 750. It is in very good condition with a little gasket material to scrape off yet. Price is $75 plus shipping.
when I replaced the stock carb on my 65 GS 3 speed with an Edelbrock 750 it really was a big improvement.