[EricH]

You're both wrong. There WAS a team #51, in 1997. However, 1997 was a temporary year--all numbers issued that year were changed the next year. Numbers were not issued before 1997, and the numbers were all changed the next year, by sponsor name, A-Z.

So, the team we now know as team 175 competed as team 51 in 1997, but due to the en masse renumbering the next year, they got 175, and there hasn't been a team 51 since. Until, of course, the 2010 season.

Data on team 51 from Mark McLeod's spreadsheet, using the 1997 temp numbers sheet.