19 Before the brake booster can be fitted to the firewall, the kit's provided power brake pedal assembly needs to find its way under the dash and to the brake pedal support bracket. The pedal is installed in the upper hole provided in the bracket. However, some pedal supports do not have the required installation hole. If yours doesn't have the necessary hole, you'll need to remove the pedal support and drill a new hole in the correct location, following the included instructions. If you don't use the included pedal, the pedal ratio will be incorrect for the booster.