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Click on image for the lowdown. 
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| | | Forums66 Topics128,196 Posts1,057,385 Members48,471 | | 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: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Any small index GM 4 speed (exept for the late '60s Pontiac "Dearborn" 4 speed) will work fine. The SM420, which was the factory option on the '57 GMC is a direct bolt in, no additional linkage required.
Bill Burmeister
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