Dude no, a head gasket is like a 4 hour job. and it cost like $20 for a head gasket. You just need a chain chalk, some Hex sockets for the head bolts, torque wrench and a basic metric socket set for the random bolts.
FYI I pull my head with the intake/exhaust on....... Wayyyyyyy faster, but its a heavy biatch to lift up by yourself.
Edit: I just bought a 240sx like a few weeks ago and have been working on it for my DD. strange coincidence. How much do you have into your 260z as of now? I've been tracking all the money going into my 240sx like a hawk...