What's The Deal With The Mopar Mini Starters?

I was thinking about mini startering my 70 Swinger 340 but Ill tell ya, if the engine fires right over, the old style sounds neat ,like in the movies, its that classic Mopar start sound. if it long cranks it doesn't sound so neat the car has to fire right up, that's the sound I like. Where you hear the gear reduction starter for a second and that's it.