There's only one Daytona 500, Snowball Derby, All American 400 (or so it used to be), Knoxville Nationals, etc. for a reason. The minute you have multiple Legend Car nationals, you take away the prestige of winning it and the ability to crown a true champion which is what the event is all about. USLC has done a pretty good job rotating it around so that everyone has a decent chance to compete if they want to.
JMO.
MT