first of all welcome, hope you enjoy your stay.
afaik boost is boost, i dont think theres a difference between turbo and s/c as far as engine longevity goes.
some people have boosted to 12 psi+ with 100% stock internals. i wouldnt consider this reliable, though. 7-8 psi is probably more reasonable, it wouldnt last forever, but no aftermarket f/i system will.