FMJ body spindles ie Aspen 5th Ave Mirada spindles can be swapped in as well as late B body and R body. Use the Cordoba caliper adapter to use the 11.75 B body rotors. All factory components actually designed to work together and parts available at any parts store anywhere.
Dr. Diff sells repop Cordoba adapters as well as anything else you might need including expert advice.
DoctorDiff Drivetrain Components
Kevin
