Fried Blue Fld wire from Alternator
Your car calls for a 2 field wire alt.
You could rewire the car to accept a 1 field wire VR and alternator.
You can not just use one of the 2 wires.
The 70 and newer VRs very the ground to change the field strength.
69 and older very the voltage to do the same.
You could replace the grounded field terminal with an insulated terminal.
And replace the melted blue wire.
This kit has both terminals in it, I don't know which one you need.
OR
Assuming the seller told you what to order for your 73 then they goofed.
If you picked it out then you goofed.
Your car calls for a 2 field wire alt.
You could rewire the car to accept a 1 field wire VR and alternator.
You can not just use one of the 2 wires.
The 70 and newer VRs very the ground to change the field strength.
69 and older very the voltage to do the same.
You could replace the grounded field terminal with an insulated terminal.
And replace the melted blue wire.
This kit has both terminals in it, I don't know which one you need.
OR
Assuming the seller told you what to order for your 73 then they goofed.
If you picked it out then you goofed.