FWIW on the heads up car the engine was just pulled at 88 passes. Still leaks down fince and compression test was good as well. It is getting destroked to drop some weight for the class we run. It makes 1054hp is shifter at 9600 and goes through just under 10,000rpm. We have broken a few valve springs along the way but are happy with it's performance. Was being freshened this yeah anyway but just saying it ran its best ever pass at the last race last year. We prefer to freshen before something breaks, So while certainly not bracket race type deal it has held up quite well with lots of RPM and really thin rings.