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Click on image for the lowdown. 
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12 members (1955 1 Series, TUTS 59, wilbur53, 3B, mick53, RdsLessTaken, carbking, DaveV, Gdads51, Joe H, tclederman, KEVINSKI),
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Global Mod,
Mod | | | Forums66 Topics128,281 Posts1,058,473 Members48,490 | | 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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| 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!
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| | | Joined: Sep 2003 Posts: 343 Member | | Member Joined: Sep 2003 Posts: 343 | I want to do a gear swap in my 54 GMC to improve highway speeds and gas milage as well, but I read some where that there are not kits available for the GMC rear end. Is this true? Also is there an easy way to ID what rear end is in my truck? The PO had already switched the Engine to a 261 and the hydramatic to a SM420, so he may have changed the rear end as well.
1954 GMC 1/2-ton Longbed
1971 Pontiac LeMans Sport
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A good Tech Tip
