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Click on image for the lowdown. 
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| | | Forums66 Topics128,076 Posts1,055,924 Members48,430 | | 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: Dec 2013 Posts: 41 'Bolter | | 'Bolter Joined: Dec 2013 Posts: 41 | How difficult is it to convert the 3 spd column to a 4 spd SM420? Is it simply a matter of swapping the tranny hump access or is the floor and firewall completely different? | | |
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