Jon,
I fly and maintain a T-6G-NA that has been in my family for nearly 40 years, it is NAA c/n 168-528 and AF 49-3404, it was rebuilt at Downey, CA just a bit later down the production line than your's. Our mfg date is 6-1-51. On the top of the rollover structure, on the left hand side, is normally located a small data plate with the serial number and total hours of the airplane before conversion to a T-6G, ours was an AT-6C prior to conversion. I hope the one on your aircraft has not been lost or misplaced. I took both the T-6G and AT-6C serial numbers of our aircraft and sent them to the USAF archivist:
Archie DiFante
Archivist, Archives Branch
AFHRA/RSA
600 Chennault Circle
Maxwell AFB AL 36112-6424 USA
(334) 953-2447
Difante Archangelo GS-11 AFHRA
e-mail:
archie.difante@maxwell.af.mil
He was able to research each serial and provide the military history. As for the civilian US history, I know you can write to the FAA using the N# and get a CD-ROM copy of the civilian records for about $5 or so. Maybe someone else on the board can provide more information on this procedure. I understand it is only a couple of clicks away for the computer savy. Hope you find the above information of use. Good luck and enjoy your T-6G, they're great airplanes.
Carl