Refurbish Master Cylinder

["Unger, Larry @ RES" <UNGERL@Reston.UnisysGSG.COM>]

Disassembled an MGA Master Cylinder, after 15 years of storage ... light 
honing
revealed several large pits on the bottom of the cylinders ... cost for a 
*new* Master
Cylinder is ~$250.00 ... :-(.

Does anyone know what the tolerance is?  IOW, how much can I remove?

Has anyone had their master cylinder sleeved/overbored?  Saw one 
advertisement
for brass sleeving and another for overboring.  I'm concerned over the 
longevity of
 the brass and the ability to rebuild the overbored cylinder at a later 
date.

Thanks ...

Larry Unger
'62 MGA