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Click on image for the lowdown. 
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| | | Forums66 Topics128,151 Posts1,056,994 Members48,460 | | 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
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Aug 2011 Posts: 154 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 154 | Working on the brakes and need to top of the master cylinder. The manual says to use "SAE 70R1 such as Delco Super 11" and I found some on ebay; but I didn't know if there was something more modern I could use. This is my master cylinder type: http://chevy.oldcarmanualproject.com/gmc/5559mm/5559mm173.htmlThanks
1955 GMC 100 Series 2
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