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Oldsguy · 03-29-2007, 04:48 AM

"O" stands for Oldsmobile to differentiate from the corporate GM 12 bolt. They were only made in a 12 bolt variety so the 10 bolt you have is not a type "O".

03-29-2007, 04:48 AM	#3 (permalink)
Oldsguy Administrator Join Date: May 2004 Location: Lees Summit MO Posts: 2,757	"O" stands for Oldsmobile to differentiate from the corporate GM 12 bolt. They were only made in a 12 bolt variety so the 10 bolt you have is not a type "O". __________________ Dan '46 2 door