aa taco chris
+1y
yeaa I wouldn't use undercoat, that stuff never dries... we have that problem with it at the body shop.
Linex would work, but is quite a bit more involved and will take a ton of masking/prepping to get right. You may also have a hard time in finding a shop to spray the inside of the cab with it... if you go with dynamat and the heat roll I would put the dynamat down on the floors first, then the heat insulate over it, then carpet. That's probably the cheapest/easiest route to go...