Dan -- Wilwood brake kits are specific for the axle OFFSET on big Ford (Torino) ends...
There's either a 2.36" or a 2.50" axle offset... That is measured from the face flange on the axle housing to the outside axle flange.... You need to find out what that measurement is.
This is the assembly for a 2.50" offset kit....
http://www.wilwood.com/BrakeKits/Bra...o=140-10329-DR
They don't offer a single piston rear kit for the 2.36" offset.... and if I remember right what I gave you is a single piston caliper setup (basically a C4 Corvette caliper AKA PBR).