If you're going to stud your tires, then stud them all. For winter driving, always put your best tires up front, yes on RWD cars too. If you got more grip at the back than up front, you might just go straight ahead in a turn/bend. Also, if you are planning on spinning to get sparks flying, I wouldn't do it. What will happen is that the studs will come loose and fly back and ruin your paint.