I have installing a rebuild 1968 200 with a Pertronix module and coil in my 1967 mustang. When trying to start it for the first time the starter continued to crank. You can hear the engine trying to run but the starter still continued to crank. This happens with the key in the start position, the run position, and even with the key turned off and taken out of the switch. We actually had to disconnect the battery to get the starter to stop cranking. The starter was tested as working at Autozone before we put it in and the solenoid switch is a new Gold line from Autozone as well. Please help.