I believe 1955.2 was the first time Chevrolet stamped the serial numbers on the frame. It was stamped twice, once on top of the frame above the front axle and a second time about 24" back under the cab.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD