My transmission tunnel doesn't fit into my 57 worth a crap. I suppose the new floors have something to do with it and the fact that this tunnel (the whole inside of the car for that matter) must have been sitting in 4 inches of water for quite a few years. The tunnel has been welded on , whole mounting sections replaced, etc. Should I just beat it into submission? Drill new holes to match the new existing? How snug should it be around the starter side? How about the driveshaft tunnel? How should it fit up to that? I'm beginning to remember why I took three years off on this project.