Anyone know where I could get a replacement Master Cylinder for 63 F-85. Master Cylinder is leaking like a seave. MC is a single reservoir system. Not sure I can use a replacement dual reservoir due to space requirements.
Rebuild kit might have to be my only way out.

 

Found one on ebay. A new NOS. Hope it works ok. If not, rebuild kit.

 

I'm not aware of anyone who makes a replacement M/C, so NOS or rebuild is your only option. Frankly, I'd be worried about a nearly 50 year old NOS unit. Unless it was hermetically sealed, there may yet be rust in the bore. Also, it's not clear how much the rubber seals have aged. I rebuilt the stock M/C in my 62 using a kit from NAPA and now it works fine, though I did have to spend some time with the brake cylinder hone to clean up the bore.

The preferred dual-reservoir M/C for these cars is the one from a Ford Fairmont, which has the ports on the passenger side, making clearance to that diagonal brace much easier.

 

x2 -