[GMC Jim]

Quote from the 1971 Chevroklet Truck Chassis Service Manual. " Fusible links in the Chevrolet wiring are four gauge sizes smaller than the cable it is designed to protect". The engine compartment wiring is illustrated as a 10 gauge red wire coming from ythe battery + to a junction block. A fusible link of 16 gauge wire attaches to the junction block and red 12 guage wire then to the various circuits. If you desire to construct your own link; use a short piece ( 1" or so) of solid ( not stranded!) wire attached to the junction. Slide a piece of heat shrink tubing down the 12 gauge wire and then solder the 16 gauge to the 12 guage. When solder joint has cooled; slide the heat shrink tubeing over the juntion of the 16 & 12 guage wires. ......... Jim