With the grille and engine in place, we had a good idea of how tight radiator and fan fitment was going to be. A quick call to our friends at Flex-a-lite and we had a huge radiator on the way to cool the huge Dodge/Chrysler RB engine. Power creates heat, and with a smallish grille and a ’40s-sized engine bay, we had to get funky. Our radiator is a Universal Fit Flex-a-Fit Radiator (PN 56410L). The radiator comes pre-dressed with dual 12 1/8-inch Lo-Profile S-Blade electric fans that should move plenty of air and keep our engine cool. Several things about the Flex-a-fit will make it work for us. First, unlike old school multicore radiators, the Flex-a-fit is thick but not because of four or five air-restricting cores. This radiator has two 1-inch rows that transfer heat very efficiently.