just got a leak down test on my 150,000 mi ls 10% leak on 1/4 and 7% leak on 3/4 my mechanic said that my was in good condition for those miles, anybody think it could handle turbo at 5 psi for now until i rebuild it?

 

know a guy with a gsr motor in his eg with 140k+ with a custom turbo kit and ran 11.3's all seanson with no problems