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Click on image for the lowdown. 
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| | | Forums66 Topics128,127 Posts1,056,675 Members48,450 | | 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: Jul 2007 Posts: 37 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2007 Posts: 37 | I solved my own problem! The flywheels are all the same Dia.
The flat surface is different. The 37 is sort of dished and the 38-39 is flat. A modern clutch, 38,39,40 assembly will not fit on the 37 flywheel. | | |
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