Rob,
My 2003 SPF is #1560 (Feb. '03 delivery) which would make me believe that the car you are looking at (if built in 1999) is probably #355. Just a guess. I think they do more than 50 cars per year. Let's do the math: 4 years x 50 cars per year = 200; which would put my car at #555 based on #355 for a '99build. Confused yet?????????
TL
Freezing in NC tonite