Inner firewall cover

[PurdueSD]

What is everybody using on the interior side of the firewall? I am getting ready to start filling some holes in my firewall and trying to decide whether i should retain the firewall insulator attatchment holes or not.

I was planning to use peel and seal, on the floor pans/ roof and back of cab, but those areas will all be covered. I want to run the rubber oe style floor mat.

One of these would cover up the peel and seal, looks like i have two options. Looking for some feedback.
Thanks fellas!

This one says its molded abs
http://www.classicparts.com/1947-53-...1/#prettyPhoto[gallery]%20nofollow/1/

or page 28 of the truck shop catlog has a rubberized version that is much cheaper.
http://www.scribd.com/mobile/doc/106275398#fullscreen
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