Yes I have done this conversion on my 46 1/2 ton I used a corvette manual (not power) disc brake master (‘83-‘84) 1” bore. Per photo I bolted a L plate to the existing support plate of the original master, which moved it back some. I put residual pressure valves, 1 front 1 rear, and an adjustable proportioning valve on the rears. I used a grade 8 bolt to extend the pushrod, (cut off the head and rounded/polished that end). My truck has a T5 gearbox. Required a new hole in floor for access.
Did/does it work? Yes but Keep reading….
My truck came to me with tired huck front and good bendix rear drum brakes on a shot single master cylinder. Braking sucked. I rebuilt the front hucks with all new slave cylinders, shoes, springs, turned drums, etc and since the master cyl was crusty inside I installed the corvette split master. Brakes still sucked (don’t mix bendix and huck…) I got a set of bendix 54 hubs and backing plates for the front from a fellow bolter,-installed with new drums turned on the hubs, new studs, new slave cylinders, shoes, springs, roller bearings, replaced all the steel brake lines, and DOT certified SS braided/ coated flex lines.
Yes, truck stops great now, rock solid pedal, reasonable pedal pressure, and pedal travel right…. Adjusted bias so with no load it just starts to lock the rears in a panic stop test. Its brakes, I kept at it until it was right on. Wouldnt settle for less.
Last edited by Hanks custodian; 06/02/20253:20 AM.
