Bench Seat Replaced with buckets. Brackets/supports needed?

Bench seat was standard. The plates for buckets and console brackets were added per the build sheet. Floor pan is pretty weak out in the open field area. It might flex a little every time someone gets in and out or even when the seat back is folded forward and back. Bound to crack eventually, initial small cracks grow like weeds.
Back when I worked for plant maintenance in a textile mill we had some sheet metal shrouds that would crack from stress and/or vibration. We would drill a small hole to round and end the crack then braze it closed. It worked. There was even a durty joke about the naval and bung hole stopping a crack from growing any further.