If that fusible link is intact check the fusible link between the connector block, on the rad support just in front of the battery, and the battery + post.
Start the car and check the voltage at the battery then check the voltage between the BATT [output] terminal at the alternator and a ground on the engine or body. That info will lead us to the possible problem.
If the battery has 12 volts and the alternator has 14 we know the problem is between the alternator and the battery, if they both have 12 volts it's most likely in the wiring since you've replaced the components.
Does the gen warning light come on when you turn on the ignition switch?

The wire that goes from the spliced buss near the horn relay to the orange fusible link and the #3 terminal at the voltage relay is the voltage sense wire. It senses the voltage at the splice and regulates the alternators output to keep the voltage at 14+. The brown wire that goes from the ignition switch to the #4 terminal turns the charging system off and on. If there is not 12 volts to this terminal the system will not work. With the car shut off, pull the connector off the voltage regulator and test for voltage at the terminal that connects to #4 on the regulator, it should be 0 volts. Turn the ignition key on and check the voltage it should be battery voltage. If you don't have 12 or so volts at #4 when the key is on there is a break in the circuit or a faulty ignition switch.
Could be a faulty regulator connection or a break in the two wires from the F and 2 terminals at the regulator to the plug in the alternator.