I have a Turbonetics GTK500 turbo with and Autronic SMC with four coils and direct fire CDI unit. Full 3.5 inch stainless exhaust. Front mount cooler, newly recoed engine withe wossner pistons group A gasket and ARP headstuds etc etc. Essentially standard cams and intake. Has had port work done. I want to get 500hp and want to know what is going to limit me? Inlet manifold? cams?