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Click on image for the lowdown. 
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9 members (Otto Skorzeny, Cosmo, RAC1812, cmayna, GRNHydra, HandyAndy, Peggy M, 1955 1 Series, 1 invisible),
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Mod | | | Forums66 Topics128,087 Posts1,055,982 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 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | The sm420 is quite a bit bigger than the crash box. I believe both of them have a 10 spline 1 1/8 input shaft. I put a 94-97 dodge 2wd 5 speed in my 1940. I used an adapter plate on the original bellhousing. I had to modify the adapter to miss the crossmember. | | |
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