The floor pan and primary chassis points remain the same [I presume you mean a new 900 vert? 1995 -98] but you'[re correct the bumper is lower so you will need to change the bumper [but it'll look odd, the Viggen has a nice full rounded shape, the aero bumper is more angular] you could contemplate using a Dremel type tool and cut the necessary clearance for the hitch to 'poke through'