.040 AND MY 2 CORE RAD IN MY 71 CHEVY PICKUP WASNT A GOOD COMBO BUT I LIVE IN THE HILLS OF E.TN. AND I WORK MY TRUCK. I HAD TO GO 160 THERMOSTAT AND 3 CORE RAD WITH A FIXED 5 BLADE FAN TO KEEP IT BELOW 190 DEGREES


I BELIEVE IN " JOHN 3:16 "