You wouldn't consider going to 340 driver and 360 magnum passenger manifolds. They are both a little over 2 1/4" exhaust hole and probably a lot cheaper. Then you won't need to worry about changing the sound. I sell these ready to install. Of course if you are dead set on headers then I recommend you buy a good set because many don't fit well and or hang really low for street driving. Unfortunately the real good one cost quite a lot!!
