If you are sure it is just the head gasket go for it. It may be worthwhile to make sure the surface is flat; sometimes they can warp a few thousandths which can lead to another failure. It would probably be worthwhile to buy a complete Felpro head set. You can compare prices, but I bet it won't be much if any more than a new head and intake/exhaust gasket.That way you will have everything you might need. It is generally easier to pull the intake and exhaust off the head; the head weighs about 60lbs by itself.
Unless you can see wear on the rockers and pushrods, there is no reason you can use them.
