I apologize for not saying so, but I recently learned that my friend who initially made the request indicated that the prop from a 150 is too short to work on the Cub.
A Cessna 150 seaplane prop??
3. McCauley 1A90/CF (seaplane only) 24 lb. (-32)
Diameter: not over 75 in., not under 73.5 in.
Static r.p.m. at maximum permissible throttle setting:
not over 2600, not under 2500 Bill