Helioching is probably not the best option. Likely you can just bend the tabs flatter or cut them off and make your own brackets. I bought a two core radiator that just barely fit in between the rails and I measured the height and put the biggest radiator in there I could with the tanks on the side. It's kind of a Chevy style...
On the other note you might be able to loosen your motor mounts and your transmission mount and pry everything back just a quarter inch maybe get a little there....
I was just looking on summit racing and they do make electric fans 2 and 5/8 in thick.. if you can make just a half inch of room you'll be fine...
