Registration closed August 2, 2017 11:59 PM at 2017-08-02T21:59:00-0700 Registration ends August 2, 2017 11:59 PM at 2017-08-02T21:59:00-0700 Registration opens June 10, 2017 7:00 PM at 2017-06-10T17:00:00-0700 Registration runs from June 10, 2017 7:00 PM to August 2, 2017 11:59 PM
In case you missed the important stuff:
Cars and rules- https://www.scca.com/pages/heartland-rules-and-regulations
Full rules- https://www.scca.com/pages/rules-and-regulations