77-87 Chevy/GMC Pickup Truck Aluminum Radiator And 14 Inch Dual Fan Kit Cold Case Radiators1977 1987 Chevy GMC Pickup Truck 19 inch High Aluminum Performance Radiator and 14 inch dual fan kit. AT Cars. For taller 21 inch version, see GMT556A21K. When you need the biggest and best, look no further than the Cold Case Super Duty Line. All Super Duty kits include 2 row radiators with 1. 25 inch tubes, aluminum fan shroud and dual 14 inch fans, flowing at 2200cfm per fan! For extreme horsepower applications OR if you just want the best of the