I have a Wilwood kit that I picked up at Summit racing on clearence for $400. Its a bolt on for the 9" drum brake spindle. Thats the reason I got it. It allows the use of either bolt pattern and 4 piston calipers. I have nothing but good things about the scarebird kit, so I wouldn't worry about that as an option. Plus, like said above, you can get parts at your local parts stores.