55.2-59 Firewall Pad

[57FleetsideC4]

So I am getting ready to weld up the holes that held the original firewall pad in place and am guessing most don't use that pad. The only reason I am on the fence is this cab will go to sandblast soon and don't want to fill the holes then realize I probably shouldn't have later. I would think going with the lizard skin sound deadener and the fat mat over that would be as good as the factory style firewall pad. I used fat mat on the wagon that I did and it went down nice but only used it on the floors and wheelhouse and wonder how it would stick to the firewall with no retainers. Steve