When I put in my aluminum rad on my 72 Cuda, I made up four 5 inch long brackets of 3/4 inch by 1/8 inch aluminum that I got from Home Depot. I drilled a hole in each end of the brackets, and mounted one end of each bracket on the radiator, and the other end of each bracket onto the original Mopar plastic shroud. The aluminum is easy to bend, and the brackets snugged the shrould up close to the radiator.