bb or sb for my 72 dart swinger

There can be only one...it's big or go home....guy walks into a bar with a severe thirst,ask barkeep for a draw,barkeep brings him one,guy drinks it right down trying to quench his thirst,didnt fullfill his need so he looks at barkeep and says is this all you got? Barkeep looks at him and says well I got this 440 magnum under the counter but I dont think you can handle it but you can give it a try if you aint afraid of torque and raw power and the sheer rush of it,about same money just most people are afraid of it but it'll definetely get you there quicker with less effort,so the guy has the barkeep bring him a 440 magnum shot,guy drinks it down puts it on the counter and sits down on the barstool all lightheaded,takes him a minute to clear his head and get over the rush,looks at barkeep and says why didnt you bring me one of these in the 1st place? Barkeep looks him in the eye and says..well it aint for everyone and you didnt ask for it,so now that you've had one do you want a regular one now? Guy thinks about it for a few seconds and says ..nope ,think I like this a whole lot better but does it come in other flavors? Barkeep says yea we got 451's,stroker's,B's and Rb's in all configurations and proofs,just pick your poison and sit down and hold on.......so I guess you know what my answer to your question is...lol