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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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Mod | | | Forums66 Topics128,005 Posts1,055,253 Members48,418 | | 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: Feb 2016 Posts: 1,982 'Bolter | | 'Bolter Joined: Feb 2016 Posts: 1,982 | My '57 2 ton originally had a 7.20:1 rear end, factory governed RPM is 4000, with 9.00 or 10.00 x 22.5 tires it would do 45 - 50 mph. I now have a 2 speed differential with 6.80:1 and 8.10:1 ratios, 10R-22.5 drive tires at approximately 41 inches tall, it's pretty happy at 55mph and can hit 63 mph at 4000+ rpm. My speedometer is roughly 2 - 3mph slow but the GPS gives me the above-mentioned speed.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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