i have heard many different things about this but i want to know can a stock b20 hold 8psi safely with no problems and still be a dailydriver

 

yes. depending on how good the parts, tuning and maintaince is it could work great and be reliable. On the other hand it could be ruined in 5 minutes if poorly assembled or tuned.

Never forget that, the motor and setup is only as reliable and safe as the person who built it/tuned it.