Sorry Knegel:
F4U-4 either paces or outruns the Pony at most altitudes and where the P-51 DOES have the advantage it's not by much. Hog out-accelerates, out-climbs, out-zooms, out-turns, out-rolls and will soak up more damage. And while I never use it as a jabo, hauls a heavier load.
Really the only two advantages the Pony has is range on internal fuel (4-Hog just doesn't have much loiter time) and pilot visibility.