My guess on the solo "9" on your block is it's the sand cast mold number. They numbered the master molds so if there was a defect after the engine was cast they knew what sand mold to look at.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD
