Re: [Chevelle-list] rear carrier question

[langus]

GM Carrier Casting Numbers

     Axle Type  Casting No. Series  Gearing  
     10 bolt 8.2" ED32118  2 2.73:1 & down 
     10 bolt 8.2" EDB30116 3 3.08:1 & up  
             
     10 bolt 8.5" 410409N  2 2.56:1 & down  
     10 bolt 8.5" 410408N  3 2.73:1 & up 
             
     12 bolt  ED32088  2 2.73:1 & down 
     12 bolt  30140PM1 3 3.08:1 to 3.73:1 
     12 bolt  EDB30174 4 3.90:1 & up