TRIMIt must be said that most people's idea of hot-rod fashion comes from the Fonz and the "Go Greased Lightning" number in the movie Grease, that is, leather jackets and shop-class jumpsuits, both worn over plain white undershirts.It must also be said that the most lingering image of an attempt to mix hot-rod fashion and high-fashion -- in some minds, at least -- comes from an episode of the cult TV series Freaks and Geeks in which one of the geeks, in an attempt to be cool, shows up at scho