4b on a slant six

well i am droping 2k in to this motor . new valves , cam , hi compression pistions , headers , and getting the head redone at a shop to seat the new valves , and push rods . ect. the only 4 bbl and 2 bbl i found that are the same is the 500cfm holly im going for the sound of power in the motor and tailpipes . i got the 2bbl and the 4bbl intakes off ebay . and i just dont know if i need the 4 bbl to get that sweet sound . and take off power . i got a new rear end too off a baracuda , just in case i ripe the stock vailant one out .