I have came across a 8 3/4 , A-body rear diff. drum to drum narrowed 3 in. (1 1/2 in. on each side) 742 case, brand new Richmond 4.30 gears, new spool,new bearings seals,truck axles-resplined by Moser, big yoke 30 spline. I'm building a 65 barracuda. Putting in a 340, not stock. I want to put...