It appears that the genius that did the 4 speed conversion on my Challenger was, to put it gently, a bit of a shadetree mechanic.
Once I got under there to replace a leaking tranny seal I discovered that the floor had been cut to hell and left ragged.
At some point that is going to need to be fixed.
<rant> It really doesn't need to be said, but I really hate half-assed mechanics. </rant>
Also, I'm assuming that the tranny has to be out of the car before grafting in this new piece...?