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Click on image for the lowdown. 
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| | | Forums66 Topics128,162 Posts1,056,917 Members48,458 | | 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: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | Here is an RPM calculator that lets you enter OD ratio. Enter your figures to compare. With 4.11s, 27" tires and a .72 OD it shows 2394 rpm at 65 mph. | | |
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