When it comes to engine durability, they now have the AVL dyno that will simulate a 24-hour race. Not just an engine running for 24 hours, but they’ve put the track map in, and they’re able to accelerate, brake, shift, RPM changes, all those things exactly like on the racetrack. As one of my old, snarky bosses used to say "they've rediscovered America". Ford did this back in the 1960s when they were doing the development on 427 GTs for LeMans.