Where do you live, and what kind of downtime can he have.

It really is not a hard thing to do, but having no experience will make the job take much longer. Figure out how much downtime you can have, get a good place to start work, make sure you have proper tools (metric wrenches,sockets/extensions/hex key for head studs) and order your parts ahead of time.

Make sure to take plenty of pictures of you have a digicam, mostly of electrical connections, and hoses. Colored tape, and a market will come in handy, aswell as ziplock bags to label parts. You want to be able to put it back together when you are done.

The most difficult part of this is probably removing the intake manifold, as its a pain in the ass, and has all kinds of shit attached to it.