i need to know what cc i should port the runners to on a z6 head and what valve size would be most effective, and also what should the seat angles be at on a 5 angle valve job. i will not be doing the work personally my grandfathers good friend will. he usually works on v8's and owns a shop and doesnt know much about hondas. i plan on using a turbo cam. also feel free to offer any bit of info you have (what cam/valves/springs/retainers to use etc..) and also how much boost can be safely pushed on this block without having to sleeve it.


engine specs:
zc block (sohc)
forged internals
polished crank
performance bearings
honed
stock bore
i will be using a y8 port matched manifold and also a b18 tb
it will be using a sc50 turbo
38mm waste gate
custom built equal length manifold or may just skimp out and use a hf
chipped ps9
tuned (good buddy of mine)

thanks for your time