Almost there. Got it to cough a bit, but I think we need to hook up a 12volt to the battery to really get it to turn over. The 6v system is a little weak. Hopefully we'll get it to fire in the next cple of days
To check ignition timing, just hook up a timing light and crank it over while watching the marks just as if it was running. If cam timing is off very much compression will be way down. Another check is cranking vacuum-back out the idle speed screw and hook a vacuum gauge to a port on the intake manifold and crank it over. It should pull sveral inches of vacuum. Or, the quick-and-dirty method: Just lay your hand over the top of the carb while it's cranking. It should try to suck your hand in. This will flood it real good, however. Make sure the plugs are clean and dry. Gas fouled plugs will let the spark just run down the center insulator instead of jumping the gap. If the plugs look/smell wet or are black, try a new set. Flathead ignition coils aren't that powerful to start with.