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Mod | | | Forums66 Topics128,065 Posts1,055,870 Members48,428 | | 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 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | An SM318 3 speed with a Borg Warner overdrive will do well with the 4.57 rears you have now. It will cut your revs by 30% in OD. 4.10 rears were available on some later 3/4 tons, but they are getting difficult to find and you don't gain much. Going to a much later complete rear axle will mismatch your front and rear brakes. | | |
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