Looking for a nice Autolite D0OF-AC or C or Y ending prefix carburetor. My car is 69 with the factory Autolite 470cfm 4V and FMX. I want another carburetor and like to try the 600cfm models for 1970 351C, I think the 69 and 70 4300 carburetors are the same as far as linkage and kickdown