Picked up AMT's new (old) Curly's Gasser '40 Willys coupe. I've built variations of this kit in the past. I've always built it as a street rod. Now I going to build it as a gasser, and this brings up a question. How many seats are normally in a gasser? The instructions only show putting in one seat. The driver's seat. Yet the kit also comes with a second seat for a passenger. I know one would never need the passenger seat for racing. But, I think I once read a passenger seat was still required in certain cases. What is the deal on this? Do I just put in one seat? Or two?