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since my truck is back stock. I have a hard time getting egt's over 1100 when not towing. So I would say you prob have a small set of injectors in the truck. I run 7-800 around town. You could also have a air filter plugged up as that will cause egt's to rise.
Got isspro guages on mine wouldn't buy any other brand. And you definately need a lift pump before you put your puck on the truck. And get you a fuel pressure guage