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Click on image for the lowdown. 
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| | | Forums66 Topics128,034 Posts1,055,542 Members48,425 | | 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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| | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I have always preferred the factory seal over the umbrella.
Once installed correctly the factory seal never fails, unless the engine sits for a long long time and the seal dries out and cracks(I've only seen this once).
My experience with umbrella seals is that they harden and crack prematurely no mater what you do.
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