Not a bad idea. I've been thinking about doing something similar with mine and using the Wilwood combination parking brake caliper. Just need to have brackets fabbed up like the front BBK to make this work.
Wilwood Disc Brakes - Caliper Part No: 120-10111-BK
Another thought I had was to see if the Scion tC rear calipers that function the same way would work with the stock mounting points.
__________________
SOLD2007 4Runner Sport Edition V6 4X4 - Natural White -
Perf: Doug Thorley Long Tube Headers | 4.56 Gears ARB Front / TrueTrac Rear
Off Road: Fr: Bilstein 6112 w/1/2" Toytec Spacer / Rr: MT ICON Long Travel | JBA UCAs | VTX Rogue 17x8.5 -10 | GY Duratrac 285/70R17 |
Rear Diff Breather Mod | 1" Toytec Body Lift | Custom Cut Axle Joints
ICE: Auto Pumpkin 10.1" Android |
3.5" Tweeter Mod Exterior: Quad Bi-Xenon HID Retrofit
2019 4Runner Limited 4x4 - MGM - Hers |
Ironman4x4 FCP's & UCA | Fuel Rebel 20x9+1 | GY Duratrac 275/60R20 | Victory 4x4 FLRR