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Click on image for the lowdown. 
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| | | Forums66 Topics128,105 Posts1,056,551 Members48,448 | | 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!
| | THANKS!
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 2006 Posts: 37 Apprentice | | Apprentice Joined: Nov 2006 Posts: 37 | 53GMCPhil the whole size is 1 1/2 Inch..or 38mm.
I know Stovebolters don't like the metric system but some of the bits I saw were only measured in mm. | | |
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