A 76 should be OK in a 60 size trainer, but I would recommend against putting one in a 40 size. This might be just a little too much grunt!

If the trainer is your first RC plane I would recommend that you do not try and go straight from it to the Corsair. The very least you should consider is getting some low wing flying experience under your belt, better still would be to get a couple planes between the trainer and the Corsair.

There are some good threads around on flying warbirds, if you haven't already done so they are well worth looking up.

Good luck with the Corsair, they look awesome on a low pass with the gear up. Don't cover it with Insignia Blue Monokote or CorsairJock will come round and get you

Terry