1967 Pontiac Firebird Master Cylinder

[art1967]

I was informed that I should start a new thread, so here it is.

I have 67 Pontiac Firebird 400, 4sp, pos rear, AC, factory 4 piston front brake calipers. This is a manual brake car, NO POWER BRAKES. A pretty original car, but not restored. My MC is leaking and was planning on sending it out to White Post for rebuild, but want to first check and see if it is correct to my car. MC is casting 5461818, code WT. some pictures attached.

Thanks for the help.