Champion Radiators in an A-Body

I was ONE OF THE FIRST to put a 26" Champion Radiator in a A-body (my 74 Duster 360). It fit ok....I have a 180 stat', and I wired in the supplied 12" Dual Electric Fans, and I never could get my car to get over 160 in the driveway.
I have yet to drive it farther than just around the block....because I went straight from crankup and warm-up/breakin to Bodyshop.

So....be assured a Champion radiator will fit. How durable it is, is still unproven to me.
I am going to use a external trans cooler later when I get it Highway Worthy....From a performance standpoint, I have never liked having ONLY the radiator cool the trans fluid.