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Click on image for the lowdown. 
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| | | Forums66 Topics128,161 Posts1,056,906 Members48,458 | | 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: Sep 2011 Posts: 2,951 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 2,951 | Thx LB. I figured I needed something over 3.42. I know I can get ring and pinion sets from Summit for about $150. 3.73 sounds good to me.
You can use the calculator to calculate the best rear diff gear.
As a side note, a forum friend has a 67-72 truck with a T5, 250ci and a 3.42 rear. His OD gear is 0.72 and he complained to me that he has to down shift on hills because the engine bogs. | | |
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