Ive got my twin turbo set up running and have tuned it for regular driving/crusing. Its time to get it on the dyno. I have 3psi springs in my gates so 6 psi should be what i am going to see to start. My combo is twin billet 6262, vic jr intake with custom elbow and 90mm tb. I am also running E85. My motor is COMPLETLY stock except intake manifold. So stock headgaskets and bolts from 1989 with 165k miles. Will it handle the 6psi without blowing headgaskets? What kind of boost do people run on stock headgaskets?