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Click on image for the lowdown. 
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| | | Forums66 Topics128,209 Posts1,057,461 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!
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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 2008 Posts: 1,775 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 1,775 | An SM420 is what trucks used up until the late 60's. Then the SM465 was used. Both are great heavy duty transmissions, with the low "creeper" 1st gear. | | |
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