I thought that you were speaking of a petition to create a two-stroke class for the Nationals.
For a one off race like this you will not need to do a petition. Just get a bunch of folks to agree to racing it and you should be set.
What would really help is having "roving" reporters for any event that has two-stroke racing involved. It's a bit too difficult for me to attend every race, take photos and write something about it. Anyone interested in doing this? It only has to be something simple.