what make model of carb for '64 slant 225

Just a FYI. OEM carb was smaller with a 170 standard shift trans. The 170 auto trans, and all 225's used the larger carb. The larger carb is more common, and can be used in place of the smaller carb. This info is for 1964 and 1965 "A" bodies. Might pertain to others, also, but can't be positive. It is correct for either the Holley or Carter carb.