I had the same cylinders on the front of my '57 2 1/2 ton and thought they were kinda tiny, too. I looked for new ones, but they were listed as unavailable in the NAPA catalog and I didn't have any luck with any of the other vendors, either. I had almost resigned myself to getting mine sleeved, but I decided to take another look through the catalog again by spec instead of application. I found two part numbers (right and left) for a later truck that had the same bore and had NAPA order them and see what they looked like. I was pleasantly surprised. They were identical to the originals in every way except that instead of the hoses entering perpendicular to the bore like the originals (so the same cylinder fits both sides), the hoses enter at about a 45* angle. That small difference made no problems at all. They were about half the price as getting the old ones sleeved. I can get you the part numbers if you like. Also, I found that the front hoses are obsolete as well. The rear one is not and is the same part number down through at least a 1 ton. I used rear hoses for the front and it worked out really nice. They have the correct ends for both the wheel cylinders and the steel lines. All I had to do was make a small braket to attach the end to the frame. I can take a pic of my setup if you like. Other than making the bracket and drilling/tapping one hole in either side of the frame, it all just bolted together. Just a couple alternatives to the parts that aren't available anymore!
