Master cylinder for Blazer brake upgrade with C5 fronts and (stock drum rears) 12/18-upgrade to rear disc

roger1

roger1

Master Mechanic
Aug 23, 2010
383
63
San Angelo, TX
78-80 uses a different master than 81- and up
That was for the change to the dual bore type needed for the new "low-drag" metric brake calipers. The parts are still interchangeable.
 
MTP-Madmat

MTP-Madmat

Apprentice
Feb 27, 2018
82
33
I can't see a reason it wouldn't work. But he says he wants a screw-on cap. I don't see the big deal about that. It is a little harder to R&R the big cap but it's not like it needs to be done very often since you don't need to remove the cap to check the fluid level.
I want the screw on cap for ease of maintenance and less mess. I check fluid every month before I go racing and the current reservoir is not see through. Plus I have to change the master so why not upgrade at the same time.
 
roger1

roger1

Master Mechanic
Aug 23, 2010
383
63
San Angelo, TX
I think the ACDELCO 18M974 should do it for you. 1" bore with 1/2" and 9/16" fittings
Application is a RHD S10 pickup.

 
Last edited:
MTP-Madmat

MTP-Madmat

Apprentice
Feb 27, 2018
82
33
I think the ACDELCO 18M974 should do it for you. 1" bore with 1/2" and 9/16" fittings
Application is a RHD S10 pickup.

I’ll see if that is readily available at the part store so I can swap out under warranty
 
MTP-Madmat

MTP-Madmat

Apprentice
Feb 27, 2018
82
33
Maybe they will need to order it. I can wait a few more days
 
TURNA

TURNA

Geezer
Jul 24, 2009
8,257
113
Socialist NY
NAPA $124
 
Tomeal

Tomeal

Greasemonkey
Apr 17, 2016
140
43
Clyde,pa
I think the ACDELCO 18M974 should do it for you. 1" bore with 1/2" and 9/16" fittings
Application is a RHD S10 pickup.


Would this be Overkill for a stock set-up?

Not trying to de-rail the OP. Just curious for informations sake?
 

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