I'm kind of interested in using a rack in my E-Body but I want to keep it period correct, maybe something like this shot of the rack in the Motown Missile Cuda.



As far as rack length goes I have always gone for a slightly longer rack & shortened the RH end of the rack so the pivots on the rack ends are exactly on the same line of pivot & height as the lower arm bushes (at normal ride height & a straight ahead steering position).