For what its worth. My voltage drop on the hot side using 1.0 cable going through a brass pass through at the fire wall then a 12" 1.0 to the starter is .5 volt drop. It was measured from the starter stud to the positive post. Ground side uses a 8" 2.0 cable bolted to a welded stud on the cage near the battery. A second 6" 2.0 cable bolted from a weld nut in the torsion bar cross member to the trans case. The drop on the negative side is .1 volt. That was measured from the starter case to the negative post.
Doug