Well, I'm stopping this for the night. With the 58.832, I'm placed at #1332, and I need to shed another 0.765 seconds off my lap to catch the current 500th place person.
The Tsukuba B-Class Leaderboard seems asolutely swamped (and completely dominated by) Mugen Integras, Elise 135Rs, and Peugeot 206 RCs. I'd love to see some classics break the top 500, and I think they can. I'm pretty confident that the '73 Carrera could hit that mark in the hands of a better driver easily, and I think I can hit that mark, but it'll take a good bit of work.
I did, however, just place 141st on Diamondback Reverse in the '73 RS.