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Click on image for the lowdown. 
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| | | Forums66 Topics128,052 Posts1,055,729 Members48,426 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Nov 2009 Posts: 639 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 639 | My master cylinder has a plastic cap. I want to order a new one and I see that you can get plastic or metal ones. If mine has a plastic one should I stick with plastic? My old man says he's never seen a plastic cap on the AD (ND) trucks. Thanks. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | OE was metal with a 3/4" square. Plastic is an aftermarket replacemnt. Either will be fine.
Bill Burmeister | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | The original OEM also has a small pinhole for venting purposes don't know if that makes a difference? | | | | | Joined: Nov 2009 Posts: 639 'Bolter | | 'Bolter Joined: Nov 2009 Posts: 639 | I'm glad to hear they were metal. The plastic one has a fin on top to aid in removeal, its been busted off and it looks like a P.O. used a screwdriver to unscrew the cap. I can't see replaceing a cheap part with another cheap part. Thanks. | | | | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | The replacement cover may be "metal" but it's not cast iron metal like the original ones were. Add those to the other repop parts that ended up in the field out back of the barn! Denny Graham Sandwich, IL
Last edited by Denny Graham; 12/21/2009 1:49 AM.
Denny G Sandwich, IL
| | | | | Joined: Jul 2008 Posts: 176 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2008 Posts: 176 | Click here and here. A good and proper cap (and master cylinder for a 41). | | | | | Joined: Sep 2009 Posts: 45 New Guy | | New Guy Joined: Sep 2009 Posts: 45 | Now that is some clean work! (kingisomer) | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | kingisomer,
Looks good.
What kind of cast-iron paint did you use?
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