Peter and Vacajun have pointed out the biggest issues IMO. I'd also suggest you rethink about the shadow cast by the dorsan antenna, which isn't coherent with that of the prop.
Also, I think you should reinforce the shading of the nose section. the engine cowling on late mark P-40s had a wonderful shape which you don't want to miss out on!
I think you have a very good start here, keep going at it and don't get discouraged!
