yeah, it might be a quick job, but if you change a blown headgasket on a warped head, its gonna do the exact same thing within 100 miles of driving it...
id say do what midlifecrisis says with the mirror trick..if it turns out to be a blown headgasket, and you are the one that is planning on changing it, take it to a machine shop first to make sure nothing is warped.. if not, you will have the same problems all over again..