Would you kindly share me your thoughts on what to do first...i was leaning towards changing the JDM GSR head to JDM ITR or change the cams to CTR or JUN III plus a cam pulley...any advice here...my block is a B20B P&P, Manifold P&P, main pulley Aluminium, valve springs Type R, lighten flywheel, LSD, Racing clutch, 4.40 tranny...thanks...