Good heavens! ALL of those pumps? By about 1/2 throttle, the accel pump has already pumped its full stroke, so no need to go past that, by observation.
If the engine was hot when it was parked, the choke would be fully open, but trying to close due to the thermostat's spring pressure. Just move the throttle a little bit and the choke plate will close on its own. Then, when the engine first starts, the vacuum break/choke pull-off will pull it open a bit so it does not flood or run too rich. As the engine warms, the choke thermostat (in the intake manifold) will get hotter and relax its spring tension and let the choke plate open fully.
To me, if the ignition system is in good shape, that 1 pump should be enough to get things fired off, on a cold engine. If you might want to use two pumps, I would suspect that should be plenty to puddle fuel in the intake manifold's plenum. Don't want to flood it before it starts! OR hit the starter and then do 1 pump as the engine is turning over.
That is a very nice looking Stromberg!
Just some thoughts,
CBODY67