I just got this Chaparral frame. Is there any way to tell the year of this frame and if it is a Rupp or Robron?

Hello are there any Vintage Kart races around the Fayettville TN or Huntsville AL area? Are there any vintage Kart owners on this forum that live near this location? I live 40 miles north of Huntsville Alabama and unfortunately outside of Twin Fountains in Shelbyville TN I see no road race type trac...