NHRA Stock class allows aftermarket racing wheels and tires, so I've never concerned myself if someone (including me) runs aftermarket, wheels and tires. For that matter, doesn't the 1320 come with drag radials?
With that said, I'm confused as to why the passenger side of the car is lifting considerably, while the driver side wheel / tire is lifting. The torque of the engine should be pulling the driver side of the car up, not passenger side. Was that picture taken when you launched of the line, or is that a "dry hop" after the burnout, before you lined up?