Question about the clutch master cylinder

[David Ambrose <stargazer1@cox.net>]

I'm spending this 4th of July working on my thoroughly British '68 MGB-GT.

I got the clutch master cylinder apart in preparation for rebuilding 
because it was leaking fluid. The inner bore looks great. But, the bore 
outside of the seal closest to the pushrod is pitted. It looks like the 
pitting isn't in an area that does any sealing.

So here's my question: Can I rebuild this master cylinder, or do I need 
to get a new one?

Thanks,
Dave Ambrose