I am new to diesels and I plan to keep mine probably all stock it is a 2004. 5 5. 9L all stock with 4x4 auto trans. I was wondering should I install a pyrometer or will the engiine de-fuel at a reasonable egt. I don't want to run hot egt's lets say above 1250. Thanks so much for the info. you guys are very helpful on this website I really appreciate it. Bobby