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Click on image for the lowdown. 
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| | | Forums66 Topics128,030 Posts1,055,418 Members48,422 | | 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: Sep 2004 Posts: 221 Shop Shark | | Shop Shark Joined: Sep 2004 Posts: 221 | According to the calculator I will be going from 2500 rpm @ 55mph to 1900 rpm @ 55 mph.
Or from 3288 rpm @ 70 mph to 2462 rpm @ 70 mph.
This looks good to me. | | |
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