Take a look at the book "Corsair KD431 The Time Capsule Fighter" which covers the restoration of a Corsair at the Fleet Air Arm Museum in England. It is possibly the only known example of a WWII fighter that has not been modified. I believe that they decided that it had wings made for a Brewster Corsair that were put on a Goodyear Corsair. An interesting book, in any case. I think you can get it on half.com and some other websites.
Good luck!