I went with 2 boxes of Kilmat off Amazon last summer & still have 50% of the 2nd box. I did the floor, back of gas tank,wall just behind gas tank & the headliner area. I was too lazy to remove the firewall pad,but i'd do that too if it was already off. I didn't want to ruin the "stock" look so I painted the kilmat that's under the seat. It blends in & I don't notice it unless i look for it.

It made a BIG difference in sound ! All the empty drum sound went away & I can hear myself think now. Its not car quiet but its money well spent. I will use the rest inside the doors eventually. It feels like a different truck now.
Attachments
59 interior dash.jpg (275.86 KB, 160 downloads)
59 interior.jpg (232.43 KB, 157 downloads)


1959 3100, original 235/3 on the tree w/overdrive. Carter YF 2100S carb, 205/75/15 w/front sway bar