Just a few details from running through this...with the R8 LMS, JMR GT-R, and Murcielago (fully upgraded):
- You can reach 84% without the McLaren...the ones you need it for are tabs 14 and 15 (car specific), the last race on tab 17 (PR69), and the three races on tab 18 (PR70/72/74)
- GC along the way are 7/11/16 for 25/50/75% completion
- wasn't concentrating to begin with but tab 12 has a PR63, tab 13 PR65+67
