There is a transbrake interface available. Back up from the burn out, flip switch, depress TB button, release button -launch, soliniod will not activate for 1 min.
That will only work with a conventional trans brake. If you're using a foot pedal, the brake can be reactivated anytime you put your foot back on the pedal in low gear.
Not in low gear that long anyway, driver slides foot over to a foot peg next to the peddle to brace for the launch. Cant seem to find the interface switch (it was a couple years ago,) My idea was to use that with a phnumatic throttle launch controller and use the trans break button to activate the cyl down track without moving the throttle peddle and did not want to cycle the trans solinoid in the process.