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is 8" rear 28 spline? no post

527 Views 2 Replies 3 Participants Last post by  DENVER
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Far as I know & read the 31" spline wasn't used until '68 for big block cars like the 428 mtr. Older than that was 28 spline. My '67 GT 390 is 28 spline. Anyone else add to this?
 
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