If you can afford it, it's best to buy new. Wheels cylinders are pretty cheap so I wouldn't rebuild one of those but I might rebuild a master cyl if it's in good condition and cost a ton for a new one.
Matthew 6:33
1952 Chevy 1/2-ton 3100 Late '55 235/SM420/torque tube 3.55 Dalton Highway survivor (using original 216) www.truckwithaheart.com
