I'm actually surprised that this wasn't suggested yet after all of the praise I've heard from people about how awesome these IMSA race cars are. I personally love the Thunderbird with the 7 eleven livery.
I updated the OP a bit, I picked the 1985 Ross Thompson 7-Eleven Thunderbird as my final suggestion for this page. I just really like this livery, it has a nice combination of the IMSA and Nascar look to it.