While I was working on my clutch and transmission, I noticed my master cylinder had started leaking from the rear. I had put a rebuild kit in it 3 years ago and the seal must have went bad.
I decided to sent it to White Post Restorations (http://whitepost.com/) this time to get a new brass sleeve installed and let them rebuild it. The cost was $175.00 which includes lifetime warranty.
The finish product turn out great.