new master cylinder or rebuild?

needsaresto said

Rock auto replacement master has a 1" bore.

http://www.rockauto.com/catalog/moreinfo.php?pk=309048

Click to expand...

Nope. That master's for a drum/drum setup.

If you want a new master cylinder ("remanufactured" is junk), use a Raybestos MC36412. Very slightly larger bore than original (1-1/32"). Fully compatible.