[sammywells]

I've reached the conclusion after 40 post on this that there is not a master cylinder for manual disc brakes for a 71-72 c10. I"ve checked all the parts houses NAPA, Advance, Auto zone, Oreillys and looked all over the internet including cardone, wagner, raybesto. The only factory stock master cylinder that seems to be available is the one with 1 1/8 bore for both power and manual brakes. Looks like i need to make a decision on that one or aftermarket.