while not ideal.... our aluminum rad is bolted to the rad support in two spots on the side. I totally understand the "cracking" theory, but it's been that way for a looonnnggg time. If it were a street car I'd probably be a little more concerned.

I like that lower rubber mount deal. Looks like that would make it real quick to remove the radiator.

I don't know off the top of my head what a filled radiator weighs, but it would be a little discomforting in a shunt, to see a a too loosely attached 200F? 15psi radiator flying out of the car dispensing all its contents. We shouldn't carry this too far.