I posted a thread the other day concerning this and got good advice on troubleshooting. The positive cable to the starter shorted on the exhaust manifold. I cut off the bad section and put a new terminal end on and reinstalled the starter. I checked continuity from the starter to the terminal block on the fender. Checked good. I also checked for continuity from the positive cable on the starter to the ground stud on the block. I had continuity there when I shouldn't have. Could I have fried the starter?