I did the brake upgrade on 1950 1/2t GMC. Mine was the CPP complete kit.
Disk brakes require higher brake pressure to the disks. So you absolutely need a new master and proportioning valve that supplies high brake pressure to the front and reduced or metered pressure to the rear drums.
If your doing this once the power brakes master is the way to go to get full benefit.
Most of the brake kits are very similar some actually are the same kit sold by supplier and dropped shipped for various vendors. There are variations in some kits.
I did the front hubs and bearing upgrade at the same time.
The clearance for the manual transmission seems to be a moving target. Multiple reports the kit just bolts I. With no conflicts.
My rear transmission cross member was missing. Many are missing and there are multiple prior posts on the crossmember topic.
I used my restored truck with out the cross member with the drum brakes, upgraded front disks without crossmember with no issues, then added rear transmission crossmember ( aftermarket ) (on a whim) could detect no difference in the brakes or driveline function.
My brake lines and master were replaced during the restoration. The front and rear lines were separated near the master during the upgrade to allow for the dual master.
I too ........believe the disk upgrade with dual master is one of best mods, right there with seat belts.
Last edited by showkey; 03/28/2021 10:50 PM.
