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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | 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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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: Jan 2008 Posts: 4,959 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,959 | Someone my generation probably did that 60 or 70 years ago. Knurling pistons was very common back then and it worked very well on GMC Zollner pistons because they were so strong to begin with. | | |
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