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| | | Forums66 Topics128,121 Posts1,056,328 Members48,439 | | 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: Dec 2006 Posts: 1,154 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,154 | Putting out a few feelers for opinions: installed the SM420 from Novak it's great. Now I want to lower RPM's at 60 mph @ 2100-2400rpm ...I have 27" tires ..1957 235...3100 ..final ratio 1:1 ...1/2 ton....I don't care about gas mileage....I don't care about going 70 mph... I don't care about towing.....no heavy hauling....... I DO care about lower rpms at 55 -60 mph.......Question 3:38.1 ring and pinion a good swap for my wants and use? What can we expect with this swap???
Thanks Steve | | |
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