1964 65 63 Corvette Impala Chevelle SS 327 Cylinder Heads 896 GM factory Chevrolet small block cast iron cylinder heads pair casting number 3795896 date code B184 and C194 small chambered design 60cc, intake valve 1.72 exhaust valve 1.50 good compression and torque removed from 1964 Chevrolet Impala SS 327-250HP 4 barrel motor also was seen on 283's one head needs one valve spring replacement see picture with two spring valves one on the right. $250.pair