Trucks did not start using "Side Motor Mounts" until 1960. However, starting in 1958 ALL Blocks were cast with the "Side Motor Mount" bolt bosses, even though they weren't used.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD