You need the disc brake set up from a '70 - '73 C Body to do this swap. The '73 set up is preferred by many but only because new rotors are less expensive than for the '70 - '72 rotors, however the '70 - '72 rotors have come down in price. There are other aftermarket kits out there. You may want to do some seaching or posting on www.cbodydrydock.com
