Anyone Made a Firewall Like this?

[glowins10]

I am looking for a quick, easy, And cheap fix for my firewall. I am going to make my own, and it would save tons of time if i can just make it like this.
Has anyone seen a firewall on an AD like this (WITHOUT THE RECESSED MIDDLE IN THE FRONT)??



I think my engine will fit without the recessed middle, i just dont know what it will look like. Also, Any tips or pointers on building and installing a firewall will be great!

Here is a link for more pictures
http://www.truckinweb.com/tech/1003t.../photo_19.html