My comment / point on the snout bars welded to the vent area and the US Car and Tool supports was in regards to either being utilized to take the load of a coil over. If used strictly to somehow stiffen the chassis I would hope you would have zero issues because I don't think they are really doing anything of significance. Maybe I read your post to fast, I thought you were pointing both out as possible ways to re-enforce the uni-body to handle a coil over load.
I'm sure you realize there are different thicknesses for components of our unibodies....and from what I have experienced, the vent area is among the thinnest. If you like it...good for you, but IMO the ends (weight) do not justify the means (strengthen function). That is just how I see it, but your car....your bars
Once again, just my opinion, your opinion (which I often respect) and others may vary. .....remember, this is a discussion, not a lecture.
