That is cool, and like mentioned the P-51 was the inspiration for naming these Mustangs.
However, and I'd guess most here know all this...the P-51's a Chevy w/a Limey motor.
Built by North American, which @ the time was a subsidiary of GM, and powered (not by design, either) one hell of a motor, the Rolls Royce Merlin (although I think most of them were built on conseignment by Packard).
Real cool story behind the developement of that plane, the 'D' version arguably the finest piston engine fighter ever built, and it was done so in a remarkable short period of time.
Chuck Yeager shot down an ME-262 in one (twin engine German jet fighter), but he takes little credit for it as it was either taking off or landing when he did (they were ~ 100mph faster then the Mustang).