I feel like i dont know anything about my truck.. cn somebody give me the specs on my motor? bore? stroke? compression? its a 2005 5.3.. also i've heard some things about higher ratio rocker arms.. instead of a cam for a lil more horsepower.. and if i was gonna go that route would it be better to do a cam? if so then what kind? or if it would be better to do rocker arms then what ratio? thanks in advance