If you can, put an 1/8 or 3/16 plate between your booster bracket and firewall to spread the stress and prevent cracking due to flexing. If your firewall insulator pad is not in I like to run a plate from the top of the firewall (on the inside) to the top of the toeboard. If on the outside, you are limited to the distance between the two raised ribs. I have seen ones with many miles with no cracks and others with few miles and cracks around all four holes. Good luck


Evan