I'm far from an expert on old truck engines, but from data I've seen, Ford and Chrysler and Conitnental have little in common.
I think Ford made it's first flathead six-cylinder engine around 1940-41. 226 cubes with 3.3" bore X 4.4" stroke. First Ford 1906 Model N four-cylinder was 149 cubes with 3 3/4 bore X 3 3/8" stroke. The Model T four that followed was 177 cubes with 3 3/4" bore X 4" stroke. Model A (2nd A) that followed the T uses a 200 cube engine with 3 7/8" bore X 4 1/4" stroke. Made up to around 1935.
Ford had a V8 in 1939 with 3 1/16" bore x 3 3/4" stroke -which may be what the 9N engine was based on(cut in half)?
Chrysler's first four-cylinder was around 1918 with 212 cubes. 3 7/8" bore X 4 1/2" stroke. Chrysler's first six around 1930 at 208 cubes with 3 3/8" bore X 3 1/8" stroke. In 1932, they came out with a long-stroke six - with 190s cubes, 3 1/8" bore X 4 1/8" stroke. It later got stretched to 218 cubes. Early 40s Chrysler also had a 230 cube six with 3 1/4" bore X 4 5/8" stroke.
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