The WAR fuselage was designed with the "average" person in mind. (5'-10" 185lbs) Some of us may have had more wheaties than others and exceed these proportions. One builder who is 6'-1" 185 lbs says he is quite comfortable. It seems that the FW-190 has more legroom than the F4U. This is probably because the F4U's rear spar is arched and the seat is moved forward slightly.
Here are some photos of me in my F4U. At 5'-10" and 205lbs I fit very comfortably.