Put a Champion 526 radiator in a 71 swinger?

Yes I did review your pics when I was preparing to do this. I kinda wish I had seen the pics before I had ordered the strips (ordered in 1/8 x 1" along with the wrong 24" radiator I just sent back, fortunately I had a 26" here for a 71 Demon project for my cousin), I would have gotten 2 x 1/8 as well. Oh well I will make it work. Just wanted to make sure I wasn't missing something obvious :)

Just picked up a 48" piece of 2'' x 1/8" on Ebay for $14 shipped

BTW, is your fan housing touching the cooling fins?

I used 2" x 1/8" for mine, and I used spacers between the mounting plate and the bracket on the fan. I wouldn't go thicker than 1/8" just because you don't need the added strength, but you may need a spacer for the bracket. You can see mine in the bottom corner of the second picture