Aluminum Racing Radiator 4 Row 716 For 1973-1987 Chevy Truck 1973-1991 BlazerDescription: This aluminum radiator is designed to provide maximum cooling efficiency to prevent premature engine failure. Its light weight, and high heat transferring aluminum features a tube and fin design that, dramatically increases surface area that enables the heat to dissipate more efficiently. This Aluminum Radiator is at least 40% more efficient than stock ones. Most importantly, it has a much higher capacity for coolant than stock ones,