HELP...I've got a 1993 F350 4x4 HEAVY duty with the 7.3 non-turbo, stone box-stock. 5sp. man. trans. & X-heavy duty clutch. otherwise totally stock. What can I do (budget) with this engine to get more power? Forget turbo, I want to keep it nat. Headers? Exhaust? how do you "turn up" the fuel...
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