I.m wanting to rebuild the master cylinder in my car. Not replace it. Local NAPA no longer carries them.
Oh the power of the internet! https://www.google.com/search?q=mas...aXrIAQrAAQE&sclient=gws-wiz#spf=1617104215739
Since you don't give any details to what the master cylinder may be off of, it is difficult to help you find what you need. 57 heap is correct, with the power of the internet add to that HAMB, there's hope for your situation. At least in my eyes.... Good Luck!
In my experience parts are usually available, the problem is pitting or just plain corrosion. You will find that they will probably need to be machined and sleeved to work properly
https://www.rockauto.com/en/catalog...e+&+wheel+hub,master+cylinder+repair+kit,1840 here is a master cylinder kit for a 60 pontiac on Rock auto. I looked at your profile page and it said you have a 60 Pontiac