im in the prosses of quietening the old bus down,ive buble wraped the rear load space along with a few layers of underlay . also against the part that slopes down to the main floor,what i was wondering was ,do the floor pans make much difference ,is it louder in the van with them off,i took mine of during resto and opted to keep them off but im now thinking of puting some on ,to quite the old bus down a tad,any ideas???