Hello!! I have a '98 GL1500CD that I installed an 85AMP alternator on. There is no reason not to do it. It won't "blow fuses". It supplies power, the bike uses what it needs.
There are a couple of places to get one (including amazon where I got mine).
http://www.sears.com/lactrical-new-lactrical-high-output-85amp-alternator-for/p-SPM11756116919I paid $129 for mine. EXTREMELY happy with it. Be careful when backing bolts out. There are only 3 bolts that hold it on and you do not want to twist off one of the wrong two. My Mechanic twisted off the third that is on the "side". Fortunately it wasn't really needed. Also, save your old gasket. We found that it still fit better than the one that came with the new unit.
I had to put it on because the OEM alternator was not generating enough current on the road and at stop lights the drain on the battery from my fog-lamps was so great that the batter would die on long rides. Thank goodness for being able to push-start the thing in second gear.
I have put 3000 miles on the 85Amp alternator in the last 6 months. Love it.