Time to buy a radiator for my 440 Dart

I bought the Champion CC374 radiator for my 74 Duster w small block. The car had 22" radiator original, and Champ fits in the opening OK. There are 3 rows of tubes on each side that are covered by front sheetmetal, but I had a 26" mopar rad in there before and it cooled great with 500 hp. There is 1/8" clearance from hood to top of cap when closing hood. I made sure the bottom sheetmetal of front yoke was flat with no bends or humps to hold radiator up to high. I have just fit it and waiting for new fan blade before I start car.