I converted my 64 to front disc brakes. A company called Scarebird Classic Brakes will send you the bracket and a list of off the shelf calipers and rotors you can pick up from your local jobber or on line.. Mine were from a 90 GMC 1/2 ton pickup . To get this done I sent him my spindles and he made the brackets using my spindles. Now you can order just the bracket. They were located in Washington State but he said he was moving to Arizona. That was in late 2016. A cheap upgrade.