I dunno...that upper mount doesn't look too stout. Can't really see lower one. I'd keep a close eye on that for fatigue cracks. Maybe triangulate the mount, or atleast weld leg on the strap to make it an angle. Best plan? Figure out a way to rubber isolate it. The rad's going to be pretty heavy when full, and hung way out at the tip of the car. Vibration will take a heavy toll on both the attach points on the rad, and the lightweight brackets.
Thanks Dave, duly noted. The mounts are made from 16 ga steel and they're obviously just tacked for now. My first thought was to mount it directly to the front. It was a very close fit, but if I had done that, I don't think I would have had clearance to put the hoses on. The picture isn't the best, the bottom mount is turned 90 degrees to the top one. I attached it kind of right behind my suspension bracket. The rad doesn't move very much at all, but I think I will run another one down from the top mount to sort of triangulate it like you said.