750 CFM for my 383 or what?

okay my 1967 273 to 383 swap is done. the 383 is a 330 horsepower 1970 HP N code with a stock carb AVS 4736S which i believe is a 600 CFM. the question is for a simple boost in power do i jet this carb, or do i go to a 750 CFM? is this overkill or will i get good results? thanks Gerry