Disk brakes that fit under stock GN wheels?

[SPOT MY 6]

Is there a disk brake kit for a Ford 9" that will fit under stock GN wheels? I bought the Wilwood Pro Street kit, but the rotor/caliper combo is too big in diameter (rotors are over 12"). I guess I need something in the 10" diameter range.

 

[flip]

i would say time for some new and lighter rims