67 master cylinder part number

[ZRGator]

I need to find out, as quickly as possible, what is the correct part number for a 67 master cylinder. Also, DC stamping on the part, or not? Thanks guys.

 

[JonM]

I won't be much help...but if you are looking for an AC Delco

http://www.acdelco.com/



18M72 CYLINDER,BRK MAS DURASTOP
1 1/8 CYLINDER BORE)(EXC HD BRAKES)(W/PB

or

18M27 CYLINDER,BRK MAS DURASTOP
1 1/8 CYLINDER BORE)(EXC HD BRAKES)(W/PB

 

[JohnZ]

The one pictured above is a generic replacement - different casting.

The correct one is casting #5455509, with bleeders, and "DC" stamped in the semi-circular machined pad on the front, and it has the "deep" hole in the rear piston ('67 manual and power used the same master cylinder). Here's a photo:

 

[ZRGator]

Thanks, JohnZ. You come through in fine form, as always.
Do you have any idea what the numbers on the left side of the housing mean? The one I was looking at had 314, yours in the picture appears to have 90_ .

 

[JohnZ]

Those are foundry pattern numbers - multiple patterns were used to create the sand molds, and each pattern had a number on it for traceability in the event that machining disclosed casting problems.