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| | | Forums66 Topics128,157 Posts1,056,874 Members48,456 | | 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: Aug 2000 Posts: 248 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 248 | Thinking of doing a similar switch in order to get the luxury of a synchro box. I have worked mainly with 4 speed 1940 to 45 non-synchro...... I have a spare tranny which I think is a sm420.....came off a 59 fuel delivery truck......salvaged/rebuilt the 261 but mated the engine to a 1940 216 bellhousing...all is fine with that set up. Now planning the next truck..... how do you identify the SM420 from others...is there a web site I can tap into and visually ID that box of mine........
Thanks
Bob C.
Bob C.
CMP Heaven
The Hammond Barn
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