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I just need to know if i build a 3.4 with 3400 pistons and top end if it will run fine off pump gas with my MPFI fuel system. Also ive already got a 260 grind cam, and all the top end stuff. Also i understand to get the most out of my setup it would be best to tune, but im short on funds and need to make sure i can still use it as my daily driver until im able to tune?