I have peal n seal under my rubber mats in my 59 and my 72. I also have jute like double foil insulation I am going to add under the rubber mat in my 72 and on the firewall to see if it will add extra quiet to the cab. I have the 1/8 polypropolene on the 59 and it was cut almost perfect and is very durable. I have a thinner one for the 72 but its also cut exactly right. Makes for good washing out of bottle, hamburger wrappers, dirt, mud, effluvia with the old garden hose!
