I'm running 13 psi on a 3.0 pulley on a 125 wet shot with stock headgaskets and stock bolts.
Keep it from detonating, and you won't have a problem. Detonation is the main reason headgaskets fail.
So what is the most boost you have seen you GEN 3 or GEN V make just show boot number with pulley combo currently with my 1.8 Rockers, spring, s2 ic, headers, etc. with my 2.8 im @ 13-14
understand that i have the rockers lol unless i can sell them and make it work getting a stock set i messed 2 stockers up which is really why i went to the roller