You can get standard size rotors that will bolt right on with no mods in the ford or chevy bolt patters. You can also get kits to bolt on larger rotors and calipers. Check out speedwaymotors.com or do a google search.
Speedway motors has a complete kit with 11 inch rotors (part #9103194) for less than $275.00. Don't know if anyone make a kit for anything larger than 11" but a lot of the street rods use the Mustang II front end so its possible.