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Click on image for the lowdown. 
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| | | Forums66 Topics128,154 Posts1,056,861 Members48,456 | | 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 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | If it has a 4 speed and you want to keep it then why don't you just keep it?
If you want an OD you either add one before or after the existing transmission or give up on the 4 speed and swap to a 5 speed OD.
Grigg | | |
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