The Stovebolt Site Forums The Parking Lot Big Bolts master cylinder rebuild kit

You can also find 1 1/2 ton Master Cylinder rebuild kit at Obsolete Chevy Parts Co. Their web site is www.obschevy.com. Kit lists for $16.95.
By the way.. the front wheel cylinders on the 1 1/2 ton use the 1 1/4 inch wheel cylinder whereas the backs use the 1 1/2 inch wheel cylinder. I see front kits listed, but not rears. I only found the rubber cups at my local NAPA store, so I had to polish the old metal pistons which luckily weren't pitted or scored.