FG Ford REAR brake mounts  suit 5 1/4 centers

These will suit wilwood and other with a 5 1/4 inch centers

The kit includes 2 plates to suit the rear, You need to grind off the 2 lugs and the caliper will sit between the 12 and 3 oclock position, you simply weld the plate to the axle hub once you have it all set up