Wrong size steering armsfor modified '65 Barracuda

Four-piston caliper or single
Sliders or pins?
Ventilated discs?
Calipers on front or rear?
Dual chamber master or single
Aluminum or cast iron.
Dual exits or just on outboard side?
Big and little reservoirs?
Bailing handle or screw top?
Tin cover or billet aluminum?
Proportioning valve mounted on side or somewhere lower on the frame?
OK,OK stop!

In 65 I think there were 3 arms available. All three had the small balljoint. One for the 9"drum, one for the 10" drum and one for the KH 4-piston calipers with ventilated cast 11.04" discs.
But I cannot recall if the arm lengths were different