Unfortunately the US Car Tool mount didn’t fit very well to the tunnel. After speaking with them, turns out the ‘67 car that was used in their initial build that they tooled off of had an aftermarket floor. So understandably, it’s not going to fit the same as a factory. 4” back it would fit the tunnel well but then it was way off location and nothing else fit. So the easiest fix here is the add some gusset plates and lap them over the gaps and mount. The important areas that need get welded are the arms and that area fits good enough that I can fully weld it there. I’ll just do a small plate at the top of the tunnel and that’s it. The mount doesn’t need to be fully welded in the tunnel.
And see here it’s located 4” or so back in a pinched area of the tunnel and it fits well. Too bad.