Originally Posted by Quik its up to you. i think the ironheads are only 295 or 300. a 5.3 is 285 for the older ones and have a better cam in them with decent flowign heads. for now just get a proper tune If I'm not mistaken, the only difference between iron headed and aluminum headed 6.0s is just the heads correct..lol..
Last edited by RichardLSX; 07-06-2011 at 11:15 AM.
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