Radiator: Corvette 1977-82 (choose) - COPPER - SOLD OUT NO MORE VIABLE $ wiseNO MORE DUE TO CHINESE ALLOY ones killing the industry. Choose between standard 350 305 Corvette Alloy radiator and a heavy duty 4 core for the 350 HD as per GM requirements. This works for 1977 82 Corvettes. Cooper brass 4 core more for really HiPerf. engines.. Core Size (inches) (H x W x D): 26 3 8 x 17 x 2 5 8 Construction: Copper Brass or Standard 3 core.. Copper.. size: 31 inch wide, 18. 5 deep, 3 " thick. Most every 350 will run a 2 or 3 core