HELP fusable link dies while driving

Okay so i bought a test light and 5 blade fuses first i unplugged the alternator no change then the starter no change then all 5 bulk head connecters then I used the test light and still found draw on the blade fuse replacement for the fusible link. My MSD box that was installed in January was the culprit. I did pre plan by not removing any of the stock ignition I just taped up the lead's running to the coil and the distributor and added the MSD. So now I can sent it in to MSD for repair. As for the alternator its still fine and 65 amp so i will feed the charge direct from the battery with a blade fuse and i will be using a plug in the lighter type voltage monitor to tell the true charge and not damage the stock system. Thanks for the advise Bill.