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Click on image for the lowdown. 
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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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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | As Wrenchbender posted, the thick part is to the rear. Here are some photos of an original shim. There is a hole in the middle to clear the spring-pack center-bolt head. There is a "locating pin" on one side and a slight dimple/indentation on the other side of the "pin". I found a few shims in my parts box that had the pin sheared off and almost no indentation on the backside of the pin. | | |
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