It's the nature of the design of most brake boosters to surround the base of the master cylinder, making a direct shot at the brake pedal difficult. Look for the cleanest, straightest path to the brake lever. If the attachment on the brake lever is offset, go for that side through the firewall. At the front, again look for a path that keeps the cable straightest. perhaps under the radiator, under the bumper, or a hole through the sheet metal on the side of the radiator.
By the way, while some states don't require toad brakes, the law of physics is in effect in all 50 states, Canada, Mexico, and most the rest of the world.