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Mod | | | Forums66 Topics128,074 Posts1,055,913 Members48,429 | | 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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| | | | Joined: Apr 2015 Posts: 113 Shop Shark | | Shop Shark Joined: Apr 2015 Posts: 113 | I have a eaton 7.17 single speed rear end on my 59 8500. I have a top speed of about 40mph. I am not looking to burn up the road but I would like to be able to cruise at 55 - 60mph. I know I can look for anothe rear axle but I want know if it is possible to change the gears in the one I have to get a higher ratio? If so is it cost effective to do it and what would I need to do to get proper speedometer calibration. OR would some kind of add-on overdrive be better? I would like to hear what others have done.
1959 Chevy 8500 - Spartan 80
366 BBC
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