1961-71 Dodge Truck Disc Brake Conversion, All MOPAR!by kenny exline on 04/20/14
I finally was able to take my 68 D100 for a test drive with the new disc brake conversion and it was great! I had a load of drywall in the bed and the brakes stopped it with no problem. When I still had the factory drum brakes on the front they would get hot and not work very well but the disc brakes I didn't have any problem at all. I used a manual master cylinder for a 77 new Yorker and it bolted up to my original firewall holes and even the original brake lines. I was also able to use the original front brake hoses, so you don't even need to change that. If you wanted power brakes you could upgrade to a power brake booster with no problem. I used 11.75" rotors but if you wanted to use 14" wheels you could use the smaller 11" rotor instead.
Here are a couple pictures of the install on my work truck..