1940 ford V-8 difficult to start after running

[G.M.]

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For these engines to start they don't have spin, they will start with a
hand crank. With a good spark and gas they will start on the first or
second turn of the engine. Battery needs to be charged so it reads
about 6.3 after sitting. Bad battery connections and loose or dirty
grounds also could be the problem but you would see this even when
engine is cold. Check the spark from a plug wire to a head nut, not
to the spark plug when the engine is cold and look at the spark to
see it is blue and jumps close to 1/2". Then try it when it gets hot
and I bet you have a small fuzzy yellow spark. ALL stock old Ford
coils have this problem. Contact [email protected] He rebuilds
the coils, send your condenser so he can check that also. G.M.