There seem to be 2 issues:
1. Vertical frame mounts: I can see Mdjay's point on this. When I had the conversion done, Steeroids was new and not too much was known about it. The cost was appealing and the power steering as well. I think reinforcing the frame mount points might be a solution to look at down the road, but I check the mount points/brackets regularly and all is well so far.
For someone looking to do it right the first time, I wouldn't recommend Steeroids at this point w/o a redesign, but I'm trying to help a guy out in the same situation as me. I assume he doesn't have the money to just run out and buy a new TCP rack, that's why he chose Steeroids.
2. TCP "broadly spread mount points" on the centerlink vs. the Steeroids closely mounted bolts. Here's my install:
http://homepage.mac.com/jbauder/steeroidsuniqueweb/steeroidsuniqueweb.html
and here is a pic pre-install of the mount points and the 2 bolts. It seems like the frame mounts could be welded to the frame and/or reinforced and "boxed in" to solve his problem. Likewise, the center bracket could be "boxed in" to make it stronger.
I still don't totally understand the "widely spaced mount points" thing. Are you saying that the tie rods impart a flex to the bracket that wider mount points could resist better? Probably true, maybe "boxing in" the bracket would solve that.
Like I was saying, I'd recommend the TCP rack over this one to anyone - I don't want "the blood of the innocent" on my hands either, but we're both in the same boat and we both kind of have to make this one work. Unless somebody wants to start a "Mustang67 and 70vert TCP Upgrade Fund"
seriously, though, mistake made, lesson learned, nobody else should buy Steeroids without a major redesign, what suggestions might you have to fix these issues that don't cost over $1k?