I love this thread.
I believe this car pictured (the blue one, not the Corvette):
Is an Ultima. I'm fairly certain this particular example is one of the cars I saw entered in the Canadian GT Challenge Cup nine or so years ago. It is either the Ultima or the Stealth. My memories of those races are fading, but as I recall there was a couple Ultimas in the championship, one sponsored by Rogers cable and driven by a former Canadian Army General or somesuch.
Chris