Here's a link to the Northeast Division schedule.
http://www.scca.com/events.aspx?hub=10
It falls under club racing/regional and the class AS will run this weekend at Pocono, Group 5, they will run with GT1, GT2, GT3 etc....and in early they run at at NJMP hosted by the SJR SCCA.
http://www.scca-nnjr.org/NNJR_Race/2...-562_563-P.pdf
I think AI and AIX are both classes that run under NASA not the SCCA.
http://www.nasaproracing.com/racing/
Last year I did a track day at NJMP hosted by NNJR SCCA and American Sedan was running that same day. My instructor was the driver of the white/blue 3rd Gen #68.
Here's a link to some pics (not the best quality, but you get the idea).
http://www.flickr.com/photos/1qwikbi...7606951818560/
Chris