Dave,
The 69 Mustangs with Drum Brakes, 6 cylinder, and V8, all used a C6OA Front Spindle.
These Spindles on there Right now will accept, BOLT ON, the 4 Piston Disc Brakes all 67 Mustangs had, yes all 390 cars, all 428 Shelbys used these same Spindles/Brakes.
11 19/64" Rotor!, 4 Pistons per Caliper, Again All Bolt on as FORD Did on the assembly line, and 14" 69 Disc Brake wheels will fit.
The Booster/Master can be added Factory Style, Correct Style, All will bolt up by adding the Factory Mustang Style Pedal.
Dan
www.chockostangclassicmustang.com