On my '55 2nd 6500,the wheel cylinders were so corroded that there was no way honing was an option. My M.C. and Hydro-vac are in good operating condition,so i'd think if you need to replace your M.C., you may as well go ahead and find complete wheel cylinders. I got mine from a fellow "Bolter, Mr. Marvin Ribbich. He is well-informed and may be able to answer your questions better than I. Look under "Big Bolt" topic: "Need help installing auxiliary transmission,then send him a P.M.-Hope this helps. Good luck!! B.T.W.,He may also have M.C. rebuild kits available. His prices are fair, TRUE ORIGIONAL PARTS,and he ships promptly.