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Click on image for the lowdown. 
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| | | Forums66 Topics128,042 Posts1,055,509 Members48,424 | | 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 2008 Posts: 71 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2008 Posts: 71 | I need to know what the input speed for the factory 1938 100mph pickup speedometer is. I wish to mate it with my TH350 and need to find out if I will even be able to slow down or speed up the ratio from the transmission enough to calibrate it correctly or If i need to change my diff ratio to make up that difference, etc.. | | |
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