Thanks everyone for the great help. I did the tune up and no more ping. At 57 thousand miles the spark plugs where pretty clean, but definatly needed to come off. I put on my headers to and for some reason the exhuast sounds the exact same but who cares it lites em up alittle bit easier after the tune up and headers. Guess next small step is taking them damn cats off and then true duals. I am also thinking about a engine swap to the 6.0. Suggestions are welcome as far modding the 6.0 b4 i drop it in. I would have about 1,500 to put into the engine after i buy it. my friends dad is a awsome mechanic so he will put it in. But im thinking headwork , cam, springs , roller rockers, and some other little ****.