Go for it!!!! We (American’s) Created the sport, and the Italians have “perfected” it. I personally would love to see another domestic kart on the scene.
Try to get a copy of Superkart Illustrated or Nartional Kart News Chassis guide. It could give you some direction. You can also look up some kart chassis web sites.
Your Success or failure depends on you. I commend you for taking on such a project.
Good Luck!
Brian Robson