new guy here. so i have the interior of my 72 z gutted and have been replacing the floor pans. i got to looking at the firewall insulation/sound deadener which is in pretty bad shape, wondering where to get a replacement. then it hit me. im kneeling on it. while ive been laying on the concrete floor welding floor pans, im laying on that cheap, foam rubber floor matting. i got 4 24x24" pieces today at lowes for $20. this stuff is very easy to cut with a utility knife and fairly soft. here are the pics