1977-1987 Chevy/GMC Pickup Truck Aluminum Performance Radiator. AT Cars. 19 Inch high overall. For 21 inch high version, see GMT556A21. 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 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 77-87 GM Truck Old Part Number: RPE556A Radiator Specs Core Height 17.2 inch Core Width 28.35 inch Overall Height 18.6 inch Overall Width 34.15 inch Overall Thickness 3 inch Tubes (2) 1.25 inch Tubes