I used the Ford GT LM Race Car Spec II to win this event on B-Spec.
The B-Bob can almost win this in NASCAR too, but it requires luck to get pass the Chappy 2J on Laguna Seca. The ZR-1 RM does the trick too.
But don't do like I did and try Buick Special '62, B-Bob drives like a drunken goose with it.
~FF