A 22 in. radiator. Purchased a brand new resto radiator for a 70 dart/with a 318, non a/c. Because my motor is a 75, different inlets, outlets. Water pump.Got the resto fan shroud to match.Soo far it runs 185 deg. In traffic ,hot days.Remember though.This is a stock freshened 75 short block,8.5-1 comp. With some good, well thought out parts added in for durability and performance.