Dan
Thanks for the response.  I know what you mean by all the dead end phone calls.  I have called and driven to what seems like all the junkyards/parts places in Iowa.  NO luck.  Ihave all my friends looking and asking their friends.  Still no luck.  I found one 12 bolt but the guy wanted $2000 for it and it was still on the 69 that looks like it was parked in the field in 1970.  He's crazy.  Anyway, what is so frustrating is that I already have the 12 bolt housing, ring and pinion, axles but no carrier.  I hate to shell out $1000 on a 12 bolt when all I really need is the guts. 
 
 
Here is a chart that helped me while I was searching last weekend and the swap meet.
 
 

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
 
Hope it helps.  Have a good week
 
 
Ryan

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