Im thinking of getting in to time attack racing next year.
Ontario Time Attack - Home Page | Canadian Automobile Sport Clubs - Ontario Region
There is a guy on this forum already doing it with his Z here in Ontario. His name is Martin Crisp, I cant remember his user name. I know him from the RC racing days long ago.
On the website it tells you about classifications of cars, better off without a roll cage and staying in the stock class unless you want to start dropping crazy money into racing and compete against modified classes.