Yes he is making 540whp, how long will it last is the question. Under any hard tracking it will blow. It is not all tuning, there is more to building a proper setup then tuning. Tuning is important, but there are many variables ontop of that.
I never did agree with the use of these metal head gaskets, or the like. Adam Hutchinson agree’s with me on this, ARP studs and stock headgasket is fine. You’d much rather blow a head gasket then something else. He ran 20psi with ARP studs and stock headgasket for many solosprint seasons.
Tuning is not hard, with proper engine management, wideband O2, and egt anyone with half a brain and a little know how can learn to do it. Ignition is the hardest part to tune, but running a moderate ignition map is fine, or having ignition map tuned by someone experienced. Ignition map is where most gains will be made on any motor.
Andrew.