You're kind of out of luck in that department. There's been a few of us here that are working on a disc brake upgrade. There is also a guy in California I believe that has come up with a kit, by machining a later model hub and installing a bearing spacer. I'm not really fond of his kit, because of the bearing spacer and it moves everything outboard of the spindle, affecting your scrub of the tire.

Here's a couple pics of what I'm working on. I'm using components from a 2007 GM van. The 13" rotor is the way I'm going to go. The caliper on the 12.8" was just too large to come up with a good bracket to mount it. BTW 3/4 ton, 1 ton, and some 1.5 ton trucks used the same bearing and hub assembly from 53-59.

http://s1074.beta.photobucket.com/u...amp;_suid=136225217756608223982073469883

http://s1074.beta.photobucket.com/u...mp;_suid=1362252233910018386534533993337

Last edited by Whitedog; 03/02/2013 1:26 PM.
1954 3600 Chevy Truck
"The Fake Truck"
In the Stovebolt Gallery
More pix on Photobucket