We run them on the street, no problems yet. The majority of the issue comes with the C clip eliminator you WILL want to use if using a spool. Since they are aluminum they don't put up with the side load abuse that the c clip bearing set ups will. If you take corners too hard with an eliminator after while you;ll tear the bearing up and have rear end dope leaking. Depending on how much power you're going to make go with a c clip axl 33 spline and strange's bad A$$ posi unit.
If you drive it 95% on street just be aware the eliminator will be your biggest isue, not posi V spool. Only way to get around this is to go to a 9" end!period...