'69 Barracuda T56 swap, floor, cross member
One of the clips was missing because case was chipped / piece missing where clip was supposed to be. Used JB Weld High Temp to fill area. Let sit over night, sanded, then filled in low spots / touched up with the 3M Adhesive which sets up fast. Should be nice and strong now.
I had to use masking tape to sort of make a mold around area because JB weld was thin and runny. Took tape off next day that worked well. Also taped area off again when adhesive was used to touch area up. That way don't get stuff where you don't want it causing extra work.
Now I don't have to live with a missing clip that holds that area together.