I am doing a head gasket on a 1990 2L 16V Saab 9000 for the first time and wondering were to unhook the intake and fuel injectors? Should I leave the fuel rail on the intake manifold or should I disconnect the injectors at the rail and leave the injectors on the head and separate them that way? In addition, should I leave the cams on the head or pull the cams and lifters off? I saw this write up were it looked like the guy left the cams and lifters on. It sounds less messy that way, but I do not want to bend a valve.