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Click on image for the lowdown. 
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| | | Forums66 Topics128,157 Posts1,056,875 Members48,456 | | 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: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I've found 1/2" -20 which is fine thread for the bolts and nuts holding it to the frame. That's on several original AD trucks. Forget if the one tapped in the box is coarse or fine, easy enough to look though.
Grigg | | |
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