ok - rough morning. truck was running like @ss - volts low... puff of smoke - bye bye fusible link. greaat... called work - going to be late. 2 things to make it more interesting. 1 - just swapped in my yellow top optima which had been sitting for 4-5 mo and probably not fully charged. 2 - last night i also swapped in my MG alternator. why did it blow? MG alt too much for it? what does the fusible link do? red wire gone - melted everything really well... whatcha guys think? otherwise bone stock 87 FJ60.