Discs on an 8 3/4?

Anyone know if this set up will fit an a body with springs in the stock location? Also will the rotors move the wheels out much? Wondering what back space wheels to use.

Depends on the kit, but they all move the wheels out. If you think about how the disks fit on the axles, and how thick they are compared to the mounting area of the drums, it usually means the wheels get moved out about 3/16" to a 1/4".

They will fit on an A-body with the wheels in the stock location, but whether or not they'll work with the wheels you already have is a different story.