The “heart” of the whole shebang is the Ford-based knuckle, caliper bracket, and spindle. Ford used a unique five-bolt spindle pattern, while Chevy, Jeep, Dodge, and International ran the more common six-bolt pattern. We went with this setup, with the ’76-’79 Ford dual-piston calipers. You don’t necessarily need use the exact parts we used. We had some of these parts on the shelf already, so that’s what we used. If you are pulling parts and see a Ford F-250 in the ’yard with a Dana 44 holding dual-piston calipers and 5-bolt spindles up to ’96 you can use the corresponding parts from it to pull this big brake conversion off.