We used to make shrouds when we still used old trucks as trucks back in the 50's. We took a piece of 14 gauge the size of the radiator and mounted it with the radiator bolts. Then cut a round hole a little larger than the fan and then made a hoop out of 1 " flat and welded it around the hole. Not the prettiest in the world, but it kept our old GMCs cool in the Texas heat.
