The P-51H is a late war variant of the P-51. Only 555 were built. It did go into service during WWII.
The specifications for it was a top speed of 487mph at 25000ft. Climb rate was about 3700 ft per Minuit.
I'm not sure about cornering radius,acceleration,and overall maneuverability but the 2000 HP Merlin plus
less weight than the other Mustangs would surly bring it around pretty quick.Its Length was 33.33ft
and wing area is the same as the other Mustangs.
I do admit being a Mustang addict myself I'm a little jealous of those late war Spitfire XVI and XIV guys as
well as those F4U-4s. So a new P-51 would make many of us Mustang pilots happy.