Yeah the head has just been cleaned up around the inlet ports nothing major done. When I decide (or if its decided for me) to rebuild the engine I will look in more headwork. Im not running the twin spark dizzy ive got a s2 bluebird dizzy that has been graphed for the engine and has a boost retard fitted. Im also running an IC&E coil and 16v ignition booster to get a big spark for the LPG.