Scamp/ Duster parts

I have an 8 1/4 here (near Carlisle, PA) It is from an F body with 3.90 gears and a sure-grip that were added.

What is your 8 3/4" out of?
My 8 3/4 is out of a 70 Dart swinger. It's only the housing and axles. How much for the 8.25? PM me