Well, the supercharger is best but largly because it adds the torque boost at the low end which is the advantage muscle cars have over importa, also the pully drive system wont be taking much force off of somethig like a pontiac 455, where as if you put one on a S2K inline 4 it would take too much power away from the engine to crank the pulley. Also unless your engine revs to about 8 or 9 turbos wont have enough drive to give a good boost. Also having an oldschool blower sticking out of the hood as the engine growls with the valves opening and closing, or the air scoop shaking back and forth as it idles looks just plain wicked.
