Neil, the throttle toe strap needs only have enough hook that you can pull it back if it is stuck forward. It does not need to wrap around or be a loop, it can be over the top or on the side, but should be over part of your foot when it is on the throttle.
Getting to the brake fast is required for road racing, but not for LSR... the only time you use the brake will be a very low speeds, like in the pits, unloading or at the end of the run when you are tired of the car continuing to roll.