Cylinder Head Question

If your compression is good and you don't have to add any oil between changes, I'd leave it alone. If compression is good and it's burning a little oil, I'd put in some new valve seals and call it a day. If compression is bad or borderline, do a complete head rebuild. If there's a lot of mileage on the engine, be prepared to find other things worn out when you open it up. You may end up having to do a full rebuild. Sure as (bleep), if you put a rebuilt head on a high mileage bottom end, the following week it will have a rod knock!