By the way, how many existing bolt points does this plate utilize? I will likely do something a little different up front including adding a single center hole to give access to the single bolt/nut that's holding the nose of my hood down. My hood concept hinges backwards via the original 2 rear mount points.
Since it will come blank, you can do whatever you like, but I instruct people to line up the frame/body with the splitter, then use the radiator support bolts as your main mounting point. From there, 2 bolts where the “firewall” meet the floor makes it plenty secure. It still seems like it needs support up front and there are many ways to do that using some brackets, cables or rods. The options are up to you