Hy ljblue, Napa p/n NMC P9220 is a remanufactured master cylinder for your truck $107.10, NMC M9220 is a new master cylinder $179.10. RockAuto lists Raybestos p/n MC9220 a new master cylinder for $110.89, hope that helps.
A hone and rebuild kit would be less than $30. Napa convinced me to rebuild my wheel cylinders and it was a snap. The master would be a cake walk. Just sayin.
Don
Can’t begin to tell you how much I hate the name Stovebolt.
So I took the mc apart and it looks good inside. I think I can rebuild it. Don’t happen to have the part number for the kit do you? I guess I could call Napa and they could hook me up.