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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,003 Posts1,055,244 Members48,418 | | 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
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with Ads!  Again, thanks!
| | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | Many on here have used Patrick's in AZ to upgrade/modify. They are experts in open vs closed. They seem biased toward closed. I myself prefer open and would switch if I had a closed by finding a newer rear end that "fit" and a motor/tranny from an open drive donor. Someone here may know about a 50 GMC and it's tranny/bell housing bolt pattern.
Once an open driveshaft is found/fabed/modified to fit, the attachment to differential is not a big deal. The other end takes some $$ and knowledge. There are certainly experts here on swapping to open. Hopefully there is a bell housing that fits your 50 GMC 228/270? and has a tranny bolt pattern for a SM420 or later 4sp open trans.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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