Looking good Thunderbolt, can't wait to see it with alpha channels applied! This is actually a Mustang that I have been planning to do. If you'd like, here are some resources I pulled together over the last year:
As you pointed out, bits and pieces - mainly the placards - were used in the restoration of Jack Roush's P-51B "Old Crow". The aircraft was a state-side trainer, based at Bartow AAF, Florida. While on a low-level trianing mission, Lt. Dean Gilmore, who was already a decorated pilot with combat experience, having flown Allison powered Mustangs, struck the water of Lake Louise, Florida, and Dean did not survive - the aircraft remaining there until 2001 when it was first seen again, due to low water levels, and recovered.