GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
If the splines match(length and location in hub, as well as number) and a thrust washer compatible to both the prop and the engine is used. Also there is the diameter of the exhaust tube, and the blades need to clear the anti-ventilation plate and the trim tab