Got an 848 head that I want to get completely redone. New valves, seats, guides, springs, etc. Head cleaned and fluxed and all the normal stuff. Would appreciate an approximate cost of doing this from your experience if I furnish all of the parts to the machine shop. In addition, if anyone in the Maryland, DC or Virginia area knows of a good, reputable shop, I'd appreciate that too. Don't want to make a costly mistake or get taken.