HELP fusable link dies while driving

Replace it with stock rebuild 78 amp wanted the 120 but they needed to order it. My buddy said to remove the power lug from the alternator and test from the lug to a ground with the Ohm meter if its grounding from there its a dead short. So i will try that monday. With the key off and I replace the fuse it blows in 2 seconds. I could not find any bare wires or recent melt evidence any where. I don't think it could be the Mini starter because the key is not on and as I recall the alternator is the only major component thats always hot besides the lug on the starter. The fusible link powers the relay the alternator and inside the car. :wav:

any other thoughts ????