Now that you mention it, I think you're right... in fact, was this car not at SCR5? I believe its Hugger orange, mini tubbed with widened steel wheels/dog dish caps? Anyone remember it? I think it even had a Roger Penske badge on the tailpan.
*edit... I just looked at the pics from SCR5... listed as owned by Tony Young... is this the Penske ZL1 you're referring to?
Penske ZL1?