Sold!

 

Just so we're all clear, these gears are from a Type O, not a Chevy 12 bolt, correct?

 

here is the text from them on facebook

or sale, 3.91 ring & pinion gear, 12 bolt type O rear end with closed (posi) carrier.
$850
Fountain Hills, AZ
For sale, 3.91 ring & pinion gear, 12 bolt type O rear end with closed (posi) carrier. Came out of my 1970 Cutlass Pace car. Asking $850 plus $20 shipping.

 

The gears were on my type O Oldsmobile rear end, 12 bolt with 10 bolts on the gear itself, it's an Oldsmobile thing.