I have a Gen1 Busa and will be running about 8 psi. For now I am just using the factory head bolts which from what I have read seems pretty safe, beyond on that I need to switch to studs. Two part question, what do you all feel is the psi range that I need to go to studs, I still have motor town down so I can switch if need be. If I can use factory bolts safely, should I use the OEM torque spec or is there a safety factor that I should make head bolts slightly tighter due to turbo boost. Since such critical information, I wanted to ask the experts. Thanks for the help.