Radiator aftermarket

I don't know why everyone wants an aluminum radiator. The experience I've had with aluminum rads are that they are weak, and don't cool as well as a brass/copper rad. The upside of light weight I get, but unless it's a race car, I don't want to give up the durability and cooling of brass/copper.
I`ve got a 28x19 crossflow "griffin" alum. rad in my 505" , 68 fastback, I was pulling on the floor jack, and pulled the jack off the k member, it bent the front splash pan and rad., along w/ the rad support up 1 1/2", right dead center, tapering out to straight at the sides.I had to straighten and repaint everything, "BUT" the radiator, it doesn`t leak ! Griffins are all welded , no epoxy. Its visibly noticeable in the car!