No we can not do any rewelding, gusseting, beefing of any sort. This class is "stone stock" showroom floor stock! You may build new shock mounts, but they may not strengthen the part in any way. You are allowed 2 shocks per wheel, they can not protrude through the hood or floor. You can change the spring rates, but must retain stock concept and mounting points.
What we had tried to do was build a Nismo catalog - tubular arm and install them. Factory offered part option. this in therory was able to be done, but Ford protested and Casey Folks sided with them.