hahaha, i can help with this one. I just had to replace all my studs in my mitsu. 2 of them broke and were striped out and the others just were old. So i orders a set of stanles steel ones from slowboy racing.com and they are great!!!
now you can go to your local LOWS or HOME DEPOT and go to the bolt sec and you will see they have some that are already cut and good to go. I had to get some bigger ones from LOWS because the 2 were striped. Get a grade 5 bolt, that is the best they have and that should be good enough.
Now to get the old one out if you can't put 2 nuts on it you will have to get a metal drill bit not to small because it will brake. Drill a hole in it about half way or a little less. Go to the auto parts store and get a tool that looks like this.......
then when you drill it, it will exstract it the other way and taadaa out it will come. The threds are like a screw going the wrong way, so as you drill in it drills out. see what i am saying?