no no no
the info tht they are giving you is all wrong. im a desiel tech and i own 3 6.2s.
u are pulling you want torque it horsepower has nothing to do with it. the 6.2 will get about 18 mpg pulling tht load. and if it stock all u haft to do to get a lil more power out of it is to advance the timing just a hair not much or you will get an idle knock but just a hair. there is a reason us milatary uses them motors they will run on about anything and run for ever so your better bet is the 6.2
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