You could make those mats work.
I would probably just cut some of the silver insulation and use some sealer/tape to secure it to your floor. That would keep the elements out and it’ll be covered with your floor mat or carpet.
Others will have more professional advice.


~ Victor
1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery
1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD
1957 3100 - moved on
1959 C4500 Short Bus "Magic Bus" - moved on
1959 G3800 1 Ton Dually "Chief" - moved on
1958 C4400 Viking "Thor" ~ moved on to fellow Bolter