The airplane pictured in the original post is neither a P-64 nor an NA-50 but is in fact a modified Harvard. The link that "Sport Pilot" posted is to that of the EAA's P-64 which is the only surviving example of its type but is not the same aircraft posted by "touch and go". Their have been quite a few Texans/Harvards/SNJ's modified to resemble a P-64 or NA-50. More info on this airplane and others can be found here:
http://www.warbirdinformationexchang...d1d65b63c873ee