The first engine may not be a 59A (1946-1948) motor. In the picture I cannot see a 59 cast into the bell housing. The radiator it is attached to looks like a 1938-1939 pickup / truck radiator. The generator mount fan is definitely 1939 or older, but the transmission is 1940 or newer. For a definite identification on the first motor look here: http://www.goldengatev8.org/tips/Evo...heFlathead.pdf

Also, DO NOT put the earlier motor on a modern engine stand supported by the bell housing. The 8BA is fine, but I have seen several earlier motors with the bell housing broken off from using incorrect engine stands.