if you know dick about engines, pop his hood and look for an extra pully in the miidle with in/out air pipes(could have a shiny intake man.). that would be a supercharger. depending on the size and boost ratings that alone could put some serios horspower into an otherwise stock car. check in sneaky places for nos too. but only a rich prick puts nos into a 350, wears it out too fast. he'd honestly have to be pushing 500 to even come close to you. past a 140 he could get you if his gearings right. my dad has a 93 5.0 with tons of mods and dynoed at 410. 3.73 gears. id ride a fuckin wheelie past him. he cant lock up and even when he does im long gone. but if hes gettin a whipplecharger and if it doesnt rip the car in half he might have a shot.