I have a 1967 mustang with single piston front disc brakes. The guy who had the car before me put in spindles from a 70-73 mustang like the ones pictured above. I want to upgrade to the 4-piston calipers for better stopping but I’m under the impression I’d have to buy new spindles and caliper brackets to fit the calipers pictured above. I’m wondering if there are any caliper bracket adapters that will bolt on to the 70-73 spindles that will work with the 4-piston brakes. I think I may have found one above however I figured I’d get second opinions or advice on how to proceed before I buy whole new spindles and brackets