Hey guys.. Called a place called "The Carb Shop" out in CA..I am from outside Philadelphia Pa, but this place is suppose to be known for good work on carbs.. His take was since it is on a 350 that is mild ect, that a 750 is just plain to big, and that for top end a 750 would be good, but since I want just a street car that is a little fast(gets out of it's own way) that I should go with an electric choke Q-jet from about 1978. Says the small primarys are great for better milage, and when you need the power the secondarys as we all know are much better..All in all a better more responsive carb for the street.. The guy makes sense to me, and he does own a well known carb shop. What do you think??