? about equipment found in a 76\' blazer im tearing down a 76' blazer right now to scrap. im removing the rear carpet cuz someone want it and underneath is a small section of what looks like a rubber bed mat. there is also another section up under or in front of where the third seat sets. what is this ? is this original equipment ? this rig has never been torn aprt before, its all original and these are to precise for someone to have made it themselves. please let me know. thanks.