there's been some good threads on alum rads the tube dimention differences (which I never would have thought of). Been a few reported issues with Champion rads being flat/poor welds but most people are happy with them & I think they have an unconditional happiness guarantee. I did have a 22 champion from evilbay in my 65 dart for $189 to my door (2 row) & had to redrill one side flange mounting hole (no big deal) & it cooled fine/no leaks/welds seemed OK to my untrained eye tho a 318 DD would not push its cooling abilities. I'd get a Champion from the guy on here who sells em & get a schroud