I took my 04 6s in to have it serviced and they called today and said that I have a valve cover gasket leaking and the valve body gasket is leaking on the transmission. They also recommended that I replace the spark plugs. The price for just the two gaskets is going to be over 600.00 plus whatever the price to do the plugs. My question is should I try to do any of this myself or just go ahead and bite the bullet and let them do it. Hoping some of you guys have done these repairs and could give me a little insight on how hard of a job it would be for me to do.