SBP disc brake conversion question
Remember that the Wilwoods have a hub register that’s over 3” in diameter. You can’t use the Wilwoods with any of the original or factory reproduction SBP wheels, the hub bore is too small. So the Wilwoods are useless if your intent is to keep a set of factory wheels.
Not sure what the hub diameter is on the Scarebird rotors/hubs, but you should definitely find out if the goal is to avoid buying new wheels.
And if you have to buy new wheels anyway, you might as well ditch the SBP altogether and get better front and rear brakes.