I sprayed the floor in the 74 with rubberized spray coat and the covered in this:
http://www.ebay.com/itm/Brand-New-Stinger-Sound-Damping-Stealth-Roadkill-36-Sq-Ft-Package-RKST36B-Sereo-/321836980498?hash=item4aeefa9912
Did floor, roof, doors and up to wheel hump. I really like it on the...