me⋅tic⋅u⋅lous  [muh-tik-yuh-luhs] Show IPA
–adjective
1. taking or showing extreme care about minute details; precise; thorough: a meticulous craftsman; meticulous personal appearance.
2. finicky; fussy: meticulous adherence to technicalities.
I'm sure he means that all cars will have proper cockpits, down to the last brush. But other cockpits will be phenomenally better because they love the car so much? Again, all cars will have cockpits, the others will have extreme detail, none seen on any other game. That is my logic served by the given information.
Or- Kaz and his team have included/scratched ideas in the cockpits, adding or removing things. 170 cars could be modeled to Kaz's liking, the exterior and interior, showing off this work. This to me makes the most sense possible- 170 cars modeled to Kaz's liking.