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Mod | | | Forums66 Topics128,077 Posts1,056,033 Members48,433 | | 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: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | I've seen mentioned modifying the SM420 to use the Saginaw 3spd overdrive. I just did a search and couldn't find anything. Thought there was even a tech tip on how to do it.
Larry
I don't own a vehicle that isn't old enough to drink.
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