[Big Kev-O]

You should never have to replace the link if your circuit is protected with the proper size fuse. You have to severly overload or direct short a fusible link in order to burn it up. A slow blow fuse could be used but it is best to use a fuseable link because they never fail. They burn up to protect the rest of the vehicles wiring. Fuses are fragile and can crack from heat and vibration. Most local parts stores have fusible link in stock. The question that needs to be answered is why didn't a fuse blow before the link burnt up? Like stated above you need a fusible link and a properly sized fuse. That said, I would never replace a factory fusible link with a slow blow fuse.