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Click on image for the lowdown. 
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| | | Forums66 Topics128,042 Posts1,055,516 Members48,424 | | 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: Mar 2005 Posts: 170 Member | | Member Joined: Mar 2005 Posts: 170 | I just checked the axle ratio on my '66 C10 shortbed fleetside. Its a 3.73:1. Look on top of the axle tube on the passenger side close to the pumpkin. There is a letter code stamped there. Mine is "HA". Now go here to see what the codes mean: http://www.americanclassic.com/paint_test.asp | | |
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