The banshee shocks are 14 3/4" eye to eye. Most LT setups are made for either YFZ shocks (15 3/4") or 400 ex shocks (16 1/4"). If you try to use banshee shocks with LT arms you're suspension will sit nearly flat even without weight on it and it will bottom out the frame before the shocks stop the suspension travel. It COULD be run like that, but it's not recommended.
If you've got a deal on a set of arms, buy those and then find YFZ shocks later to match.