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Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,050 Posts1,055,648 Members48,426 | | 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
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Apr 2005 Posts: 381 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 381 | I think most spring shops make ubolts from grade 5 steel. It will stretch before it breaks. Grade 8 is too brittle. About that 4140 steel - isn't that Chromium -Molyb denum? That's strong stuff they make tubular chassis from. | | |
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