[_Ogre]

i can't help you with either question, but have this tidbit to offer.
58TRUK has 2 layers of fatmat and a 1/8" layer of ensolite foam covering most of the interior. where my heel sits on the floor in relation to the gas pedal is a big divot. i suggest that you figure out where your heel will be on the floor, cut out the fatmat and foam and lay in a 6x6x¼ piece of hard rubber. i've always had a floor mat in truk and only notice the divot when i vacuum, but you can tell that the carpet is sitting on the metal floor, the fatmat is mushed up on the sides.