cost of head machining/valve job

I'm assuming you are removing the cylinder heads yourself, if that is the case, this question could best be answered by a good machine shop - the one we use in Lake Havasu City,AZ is JD Machine (928) 855 1411 -- If you are looking for a complete job price, it would be best for you to take the vehicle to a trusted shop and let them diagnose the issue and then they would be able to estimate the proper price for the correct repair for your situation and vehicle..