I had some left over raw steel after building my utility trailer so i fabbed up my own connectors, might be a slight bit heavier but their stiff as a bastard.
I'm going to be farting around in the garage tonight after work, so if I get the time, I will snap a couple of pics of my GW set for you so you can see where they mount exactly.
And i've poked around under hundreds of mustangs, and one look tells you that the MM's and global wests are stronger than the KB's.
Besides i don't think (could be wrong) KB offers their set pre-welded like global west, and from what i'm told their is some serious extra time involved and getting them all welded up.
I just got my Maximum Motorsports full length powdercoated subframe connectors today....they look great! I say they are probably 5ft long too. This afternoon I have to stop down at the muffler shop and see if they will weld them in for me.