I did mine just before christmas, i saved $700, by doing it myself.
Got the head shaved & vac tested for $40, i cleaned the ports, chambers, valves.
Parts/machining cost me $250, then i got the injectors serviced, $198, Steel .025" steel head gasket(from Jim Mock).
At the same time i put on a set of Jim Mock Headers.
For this job I was quoted around $1000, plus it gave me something to do whilst on leave.