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Click on image for the lowdown. 
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| | | Forums66 Topics128,192 Posts1,057,228 Members48,465 | | 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: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | If you change the rear end to something with a better gear ratio you may find that your sm420 works just fine. Unless you are going for a rear deep rear end ratio and then want a overdrive transmission. | | |
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