This car was an automatic, and though the paint was fresh, it was already two-tone before the owner had it painted. That honeycomb grille was apparently unique to the 10th Anniversary edition in 1981 (formerly the USGP edition grille in 1980) and the alloy wheels are also correct (albeit painted black). So it's probably a GTA 10th Anniversary Sunchaser, which would make it a very rare bird indeed.