I am running a stock 318 with a 2 barrel, I think removing the engine for a cam is above my capabilities but adding dual exhaust to my manifolds seems doable. Would that along with a 4 barrel and new intake give my engine a little more "umph"? So to speak haha. Is installing dual exhaust come with any problems I should know about before attempting? Its a four door dart and I am tired of it looking sounding and driving like a grandmothers Sunday car.