I have a 68 with a 350 small block that won't start. When I turn the key, I get nothing, no clicking or any noise at all. I took the starter off and had it tested, it is fine. I put in a new battery, no change. I did notice that after attempting to start, the wire coming off of the positive battery cable that goes to the wiring harness over by the voltage regulator gets extremely hot. The voltage regulator is only about 1 year old. Any ideas? Thanks for your help.