the ASR's can be had for standard lenth shocks or long travel, and do bolt right up to your existing spindles/hubs/drums or disc brake.
they will bolt onto your existing everything except hydro bakes may require longer + lines ?
IMO, the banshee shocks i had sucked, way too soft for the riding i do, (i gave them away)
and will be even softer when + a-arms put more leverage on them, i think you'd be better to stay with the stiff stock blaster shock and allow the + leverage to soften them up a little, even wheel spacers on my black blaster softened up the stock shocks to a bearable level.