I'm back!!!
I believe Zippy to be in a class of his own. Coupled with Gary's championship driving skills and will to win, he matches up with the best. I see a lot of similarities between his style and Jimmy Prock's but maybe that's just me? That being said, even the best crew chiefs have had their moments of doubt. I remember Ace's "Woke up stupid" statement and Coil's early year in the 2005 season and Alan Johnson is now writing the book on "perfection in limbo." Any one of these guys could be considered "Tops" in their field given the perfect circumstances but any of them could also stumble a while.
Best news is that they all can, and will sift back to the top.