I have bored the huck type wheel cylinders with good success. I did all four on a 46 1.5 ton 6 years 15,000 miles ago and have had not one problem. The cylinders were done on a Bridgeport with a simple home made jig to hold them. I turned the new bigger pistons out of t6 aluminum. This was done with a total outlay of about 8 bucks for cups and a fun afternoon in the shop.
