We made 404 AWKW on pump gas with 2530's...28psi. HKS full kit...dumps/mani./piping...5 inch thick cooler...720cc injectors... 3 bosch fuel pumps...Power FC.
Engine was all Nissan except Arias pistons and tomei 260 cams.
What you dont need is the Greddy plenum, 272 cams, rods are only optional as correctly prepped stockers are certainly up to the task...just make sure ARP fasteners are used.
Feel free to pm if you need a hand.
Paul
P.S. We constantly made between 440-460 when pushed with C16 and 34psi.