If you've warped your head, a simple gasket replacement won't fix
it.  It shouldn't cost too much to get a professional opinion and
estimate.

I once had a little car that burned too much oil for the local
regulations, and I decided that the valve guides needed to be
replaced.  I removed the head and took it to a machine shop to
get the head set up, and put it back on when it was done.  Saved
a lot of money that way.

You'll need a manual to do the R&R, but you should probably be
able to find a recommendation for a good one.