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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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| | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | I believe you have a dropout style differential. Go to a driveshaft shop and tell them what you have and you want a driveshaft with a slip yoke for a sm420. They will advise and tell you what measurement they need and build it for you. One piece will work fine.
Option: there will be 55-59 trucks with dropout diff and SM420 to salvage a slip yoke driveshaft from. 57 is 114" WB and 51 is 116" WB. Shortening or lengthening an existing D/S may be cheaper.
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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A good Tech Tip
