Re: Another starting issue
Try putting power directly to the purple wire (start wire) down at the starter solenoid. If it starts then you aren't getting enough voltage down to the starter. To prove it, put a voltmeter down on that purple wire at the solenoid and see what the voltage is when you try to start it.
I suggest putting in a relay on the firewall that pulls power directly from the battery. This way the ignition switch is only being used to send a signal to close the relay (about 200ma) instead of trying to energize the solenoid (4-8amps).