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Click on image for the lowdown. 
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| | | Forums66 Topics128,268 Posts1,058,375 Members48,485 | | 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: Jan 2003 Posts: 48 Apprentice | | Apprentice Joined: Jan 2003 Posts: 48 | I have a '47 3800 1 ton. I swapped out the 5.14 rear end with a 3.90. Got it from Randy's Ring and Pinion 800 292 1031. It is now mathmatically possible for the old truck to do 75 mph. I had it out on the highway and kept up with traffic, but the speedo doesn't register above about 53 mph.
Wilber
Don't read the directions, that'd be too easy.
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