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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!
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| | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | A '63 should have the 12 bolt GM axle, not a Spicer. Use of the Spicer diff (a 45 in this case) would be more of a GMC thing. The 12 bolt does have a rear cover and similar construction to the Spicer. The Spicer rear cover looks like this http://www.ringpinion.com/DiffDetails.aspx?DiffID=15&PartsLink=PartCats.aspx%3fSearchMode%3dDiff%26TypeID%3d3%26Type%3dDana%2bSpicer%26DiffID%3d15%26DiffName%3dDana%2bSpicer%2bD44
The 12 bolt GM is more like this one http://www.ringpinion.com/DiffDetails.aspx?DiffID=34&PartsLink=PartCats.aspx%3fSearchMode%3dDiff%26TypeID%3d5%26Type%3dGM%26DiffID%3d34%26DiffName%3dGM%2b12T
Bill Burmeister
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