as big dog has said i do run a BL in one of my evo III's ( standerd not and evo's) i have not had any problems what so ever with the diff's melting, i do run my diff a little on the loose side, after a diff rebuild i break it in by runing the car at 3 volts for one min and then holding each tire seperatly for about 30 sec. Then make the final adjustment by placing one tire on the work bench and holding the spur gear loosent the diff until you can just bearly turn the tire not on the work bench, ( just like in the x-ray setup guide.)
Were they melting the front or rear Diff. ??????????/
i always run a one-way.