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Click on image for the lowdown. 
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| | | Forums66 Topics128,090 Posts1,056,371 Members48,442 | | 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: Dec 2015 Posts: 2,063 Big Bolt Forum Moderator | | Big Bolt Forum Moderator Joined: Dec 2015 Posts: 2,063 | welcome to the site! Sounds like a good start!
Are you sure it is an SM420 and not an SM465? last year of the 420 was 1967 (except for some military trucks). SM465 has a PTO cover on both sides, SM420 only on the driver side. | | |
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