Sorry it took me so long. Here are the pictures of the way I do a aluminum rad in an a body.

I use 90s dodge dakota lower rubber mounts in the holes that are already in the core support. I weld a 1/2 inch dowel rod on each tank and weld a flat piece on each one to set on the mounts. Then, I weld two pieces of angle at the top of each tank that line up with the holes that are already in the upper part of the core support.
I stick early 90s dodge caravan rubber mounts through thee holes and draw them up with 1/4 inch bolts. When its done, the whole radiator is mounted in rubber and all it takes is two bolts up top and it comes right out..