So, now that I have a reason to remove the heads, which new heads should I get. I am also changing the intake manifold. I am going full bore this time. I have PI heads now... Still pushing about 500 to the wheels (before the head gasket went on me). I haven't done much research lately. Any new tests done that work very well? Which heads and intake manifold. I am pushing about 15 lbs. of boost with my S-Trim, but may move up to the T-Trim...