[AZKen]

Grinder flap or Wire wheel the surfaces of starter and bell housing not wire brush. Post pics of all the positive hookups and negative hook ups. Good, clear, well lit pics. The click seems to show that the ignition switch is doing it's job to energize the solenoid, which is a giant relay. It is the starter power connection/cables/clamps/crimps... somehow breaking down...or the BATTERY!!!!!!!!! The switch to a known battery will give a great clue right away.