I have a 2wd saph with forged pistons 7:6:1c/r bd10's ported head t35stage3 and dark greens. Fresh bottom end with arp everything and new oil pump.
I currently have gp a head gasket and bolts.

What sort of boost are you running with the same spec???

And If I were to upgrade to greys and try and make as close to 400bhp would I need to fit a wrc gasket and long studs???

Cheers