Over at Script Zone, they have a review of the Death Proof script [via Dark Horizons]:

The basic plot follows a trio of young girls (Jungle Julia, Arlene, and Shanna) as they spend their night bar hopping, going after and teasing boys, and getting trashed. Meanwhile, a muscle car driving stuntman named Mike (Mickey Rouke is rumored to be in the role) with a unique sexual fetish stalks the girls and, ultimately, uses his car to terrorize them.

The reviewer thinks QT is going to have a problem getting the script cut down to an appropriate length for Grind House.