P-40 cockpits are the earliest ones we have in the game. As mentioned, they will be redone (eventually).
Just my luck, I spend months on-and-off working to re-skin the P-40E cockpit and watch, as soon as I get done they'll change it!
P.S. The P-40N wouldn't be TOO much better than what we have now. Apparently our P-40E is modeled as a P-40K. Our P-40E and P-40B in-game have funky curve chart and engine setting relationships, and really don't match up to historical aircraft. Many of these first-generation craft have mixed data, compromises between versions, and so forth. Our typhoon is also a bastardization of different historical versions, if I recall (from past forum discussions)