Just don't turn.
Seriously, I have run a spool/welded diff with no issues at all. In fact I had more issues with my Detroit unloading on me driving down the freeway, scares the crap out of you then you realize it was just the Detroit unloading. Yes the outside tire will scuff in a turn but it's not biggie and if you don't accelerate around corners you will notice very little extra tire wear.
