Hi, do now on 29May finally in foreign use in the time my car is made complete. my question is now because my motor is overtaken, whether I have to do a complete cylinder head machining (cost point 500€) or not. should bring to the 100ps combined with fan manifold and carburetor tuning. ask because winch suspension + engine overhaul + welding work costs me so already enough worth it since a head machining which in turn can mean damage to the motor would like to hear a few pro and contra opinions