Help! Slow Battery Discharge

67Dart and 65-440 are both correct. When I worked as a dealership mechanic we would attach a test light in series on the ground side of the battery cable between the cable and battery post. If there was a current draw the test light would glow. Then we would start pulling fuses as suggested, or go straight to pulling the main wiring harness connectors at the firewall. If unplugging a fuse or harness connector turned the test light off, then the problem was in that circuit. From there start unhooking whatever is on that circuit to isolate the problem.
A good wire harness diagram, such as a FACTORY repair manual is a must-have, as they will have the correct wire color codes. Books like Chiltons, etc usually have incorrect diagrams/omissions, and/or wrong wire colors.

One day a car came into the shop, blowing some particluar fuse on a regular basis. Unplugging everything on the circuit one by one did not fix the problem, finally with the help of the factory wire diagram found the owner had plugged togther two wires that were for an accessory that the car did not have, but the owner thought should have been connected. Those two wires were not on the circuit that was blowing fuses, but were causing the fuse to blow. Try finding that without a good wiring diagram.