1963-1966 Chevy/GMC Pickup Truck Aluminum Performance Radiator and 16 inch fan kit. For trucks with original 3 core mounts. These COLD-CASE radiators are Tig welded 100 percent aluminum and absolutely beautiful. Don't buy a 3 or 4 row aluminum radiator! It doesn't cool as good as these oversize 2 row models. These radiators are original appearing and have the correct stamping. Once painted, you'd be hard pressed to find a difference over an original versus a COLD-CASE. 100 percent TIG welded Fan Diameter 16 Inch All Aluminum Polished OE style tanks 16 fins per inch Corrugated fins that give more surface area and more thermal transfer Pressure tested For automatic trans Direct fitment for 63-66 GM Truck Old Part Number: RPE55AK Radiator Specs Core Height 17.4 inch Core Width 22.75 inch Overall Height 22.5 inch Overall Width 24.5 inch Overall Thickness 6 inch Upper Hose Lower Hose Tubes (2) 1.25 inch Tubes