Hey mod,
You may want to check at your LHS for these sweet reference books.
Squadron does both a walk around and a in action book on the Stang.
There are a few other books that Squadron does that pertain to the Mustang and her units.
If I'm not mistaken Detail & Scale has a book out and theres a book called P-51 Planes and Pilots #5 that consists mostly of colour line drawings but it does have some good reference pix. There are a few more books out there but at the moment I cant seem to remember there names off hand
Heres a few sites that might help ya out a bit.
http://www.sgmitchell.com/P51.htm
http://www.flightjournal.com/plane_profiles/p-51_mustang/p-51_mustang_details.asp
Flaps up, Mike
If you would listen to everybody about the inaccuracies, most of the kits on your shelf would not have been built Too Close For Guns, Switching To Finger