On both of my cars, I used a Long cooler (also sold under the b & m and various other names). It is a radiator style cooler. On the duster, I made a some angle brackets and bolted it to the rad cradle. There are enough holes in the cradle from the factory, that with a little imagination you don't have to drill any additional holes in it. I also used this approach on the Challenger. This kept the cooler off of the rad, but still in the direct air flow through the grille. Mounting a cooler directly on the rad helps the radiator shop down the road. Nothing like a cooler full of oil bouncing up and down on your radiator fins. :lol:
