[Tx Firefighter]

I've been ASE Master Certified since 1991, and I will argue that a disc swap does require a different master cylinder and prop valve than a drum truck used. I've done at least 10 plus drum to disc conversions, so I speak from experience. I learned about using 73-87 stuff years ago through first hand experience. I know about the 1 inch and 1.25 inch rotors used through the years and the corresponding spindles and ball joints.

This truck is different though. Duallys are a different breed. I'm using 84 donor because it has bigger brakes than earlier duallys used. In 1975, GM upgraded all 1 ton truck brakes to much larger than 71-74 trucks had. I could have possibly swapped the earlier, smaller dually brake rotors onto my existing spindles, but I went this way to get the biggest brakes possible. This is a towing truck, so monster brakes are a priority to me.

I have all of the details planned out on this conversion. I'm just going slow to make it pretty and perfect.

Springtown is west of Ft Worth.