Bill- I would not be too interested in what props came with the boat, better to focus on what props are best for the boat in the condition it is now.
Until you get the phototach data, it is all guesswork. Those engines are rated at 3000, so if you are getting 3300 you are seriously underpropped. In fact at 3300 the engine governors are likely reducing fuel rate so it makes it hard to calculate optimal prop.
Get the phototach and check helm tach calibration. Can be done dockside in neutral, rev to 3300 on helm tach and go shoot the engine.
What props are on there now, dia and pitch?
Shaft size, measure it behind the tranny.
Boatdiesel has a good prop calculator, enter your boat, engine and gear data and it comes pretty close.
For a boat like yours, three blades are recommended as long as optimal 3b can fit. 3b more efficient than 4b, all else equal.