Wow I just saw that this was an old thread but with couple of new posts and questions.
On the Camaro radiator, there's really no reason you coudln't use it, and effectively. What you would have to do is figure out how to mount it. It has plastic tanks and no mounting brackets/holes. It's meant for a saddle mount in a rubber cushion. So you'd have to provide those and attach them to the radiator support. The Camaro fan can be mounted directly to the radiator support. You'd have to fab and weld some tabs to the support, etc.