FOUR SEASONS HVAC Heater Core Fits 1964-1966 GMC G1500

1964 GMC G1500 Copper/Brass Design; w/ Standard Heater - 7-1/8" x 6-1/8"; w/o AC;. 1966 GMC G1500 Copper/Brass Design; w/ Standard Heater - 7-1/8" x 6-1/8"; w/o AC;. 1965 GMC G1500 Copper/Brass Design; w/ Standard Heater - 7-1/8" x 6-1/8"; w/o AC;.