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Mod | | | Forums66 Topics128,078 Posts1,056,027 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: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | I'm assuming you're talking granny box 4 speeds. The SM420 (48 to 67) and the SM465 (68 to 91). The bolt pattern is the same, the hole in the bell housing for the input bearing is larger for the SM465. The early bell housing can be used with the SM465 after the hole is enlarged. For info go to the Novak tranny page
Fred
52 3600
69 C-10
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