That's not how PT works exactly... plenty of ways for a 100% factory car to get bumped up a class by optional extras, having wider than base tires, if it comes with a tire compound that isn't 0 pts, etc. And I don't think I've ever seen more than 5 actual bone-stock cars at a NASA weekend since I started in 2003, heh! Understanding whatever ruleset you use to map to enduro classing is key to not getting caught out with your pants down. Happy to help with PT (and ST too, it's not straight-up hp/weight) if needed
ST3 will be faster than PTA, the question will be if it's fast enough to be beyond everything else in E0. That'd be a great question for you guys that run within the Enduro series more often than I do (at once a year..
) What are the usual top dog classes in E0?