Ok I think Im going to do a tune up on my LSC um other then plugs fuel filter plugs pcv valve and air filter is there anything else I should do? Also are the plugs hard to get at or are they easy to change, is there anything I should be carefull with or are they straight forward also I take it that they are under the cover on top of the valve cover with the 3 or 4 bolts right? Thanks for the help!