Thus, the name "Stovebolt Six", originally referred (refers) to 1929-19?? straight six engines.
194 cubic inch
1929/46hp, the "cast iron wonder";
1932/53hp, was the first Chevrolet "truck" engine
207 cubic inch (1933/56hp, 1934/60hp, 1935/68.5 hp, 1936/72hp)
216.5 cubic inch (1937/85hp-1941/90hp-1950/92hp-1953)
235.5 cubic inch (1941-1954), a truck-only engine
235.5 cubic inch (1954/112hp, 1953 Powerglide - 1962)
261 cubic inch (1954-1962), a truck-only engine (also available in Canadian Pontiacs)
Some people include later 230, 250, 292 straight-6 engines as "Stovebolts".
A generous and inclusive meaning is given to "Stovebolts" by this website - Stovebolt refers to Chevrolet (and GMC?) trucks through 1972 (and does not just refer to a straight-six engine).
Does anyone have a photo of the stovebolt headbolts on an early Chevrolet 6 cylinder engine?