Thicker is better with boost. I'm also running arp bolts but a "high-perf" felpro .039" @ 11 lbs. Mopar doesn't seal so well only due the fact that there is only 4 bolt holes per cylinder. I retorqued my head bolts after a few heat cycles and they tightened up slightly.
Overheating is a problem since there is so many hot pipes and so much more power. A scooped hood and wrapped pipes help.
That pan seal only popped from the head gaskets bleeding compression into the system.
