Stop in for a cup of coffee

Good morning. Getting the Fury ready for a road trip to Atlanta on Sunday. Mechanically it's fine and I have all the emergency stuff in the trunk. I want to put the kick panels back. My question, should I put some kind of insulation material in there? If so, any ideas on what's good and cheap?
there probably was some in there originally but you don't need it - where the screws go through there is a "tower/spacer" on the upper ones - yes? 3 screw points? upper, lower and foot sill right?