My car had scars from the drive shaft hitting the floor in what I would guess as a 7260 u-joint failure. I don't think that is what caused the floor support welds to break in it self, but im sure it was all part of the big picture. my floor wasn't pounded up from the snubber like yours. Im saying these 4 speed cars were probably hammered every chance they had and this was for sure a weak spot in this body style.