The cheap ebay head gasket sets are crap, i got one and only used the stem valve oil seals, they didn't last 6 months you could see they'd worn compared to the original ones that had been on for 13 years, i learnt my lesson.
Make a list of all the parts required then buy good quality ones from an engine reconditioners, go for a payen bw750 hg or the victor reinz mls hg, it may cost more but if done right the first time it won't need doing again saving in the long run.