PatM: I haven't seen a firewall mounted one, but Jim Carter sells on that mounts to the support bars that go between the firewall and the top of the radiator support. It has two little arms (one on each side) that flip out to hold the bottom edge of your hood. There's a 46 in the gallery that I remember seeing it on, but I don't remember just now, which truck it was. There was also a discussion about a month or so back on this same topic. Good Luck.