IMO salt bike alignment will be more critical than the drag bike ,
i drag raced my cambered frame for years , never knew there was a fault,
it was a modified frame , raked by a very reputable Aussie frame shop , i never thought i needed to check the work
and the issues only showed up on the salt .
Your maximum torque will be happening right where you need your best alignment ,
i like Bo's idea , even just forcing the bar will give you an idea of the frames elasticity or rigidity