being up here at altitude will hurt ya .. like me .. LoL..
but 300hp can be obtained with 440cc's and 16psi (ish) with proper tuning.
Slownrusty .. when you begin the project.. I'll help ya build it up.. im swappn in my new motor and finally a Holset next week.. and give ya an idea maybe i'll hit 300rwhp.. but I need tuning.. guess thats why I have the wideband huh?
Oh yeh.. you DONT need ARP studs, you DONT need an external wastegate, you DONT need a port and polish and you DONT need an aftermarket cam!!
Look at Thumper or 240hoke.. no head work.. stock cam.. 11 sec cars (well Hoke's if he had drag radials) and they are estimating 320rwhp + !!
all you need it boost and fuel