For my Cobra, I welded up a frame made from 3/4" aluminum angle that covers only the radiator core. The screen is 1/4" stainless screen from Pegasus Racing. The screen is sandwiched between the aluminum angle, using 3/4" aluminum strips. The strips are secured using 10-24 stainless screws and nut inserts. The screen is held 3/4" away from the rad core, and should deflect most stones and road debris that may be thrown.