Yeah the head is the only thing holding me back on going through with anything on this car. Already having a Nismo high volume pump, gtr injectors, FMIC, Greddy type RS BOV, 3" exhaust, highflowed r34 turbo all working through a nistune might be easier to spend the money rebuilding a rb25 and whacking it In with a better ecu. From what your telling me an rb25 would see considerable improvement I'n my r32 then In a r33. I will have to look into what's involved In the conversion. Like a better gearbox for the extra torque ect.