My Radiator Cracked

Buy it once, save your money on the cracked rad and just buy a real nice rad. This way you don't forget about the one you have now once you put in the 340 and possibly damage it. It's easier to get a car to warm up than to cool down. If you don't care about original style get the largest aluminum rad you can fit comfortably in the car. It's nice knowing that your car won't overheat in traffic or on a scorching day. And you can always have a rad shop build you a real nice copper/brass rad. It'll just cost more.