I have put new studs in other vehicles without issues, but it's being a huge pain in the ass on my mustang.. I ordered some longer studs and I can't get them in all the way.. I've been using a stack of washers (both a big stack and small stack) with a nut and a long breaker bar to pull them in and they get about half way and I can't move them anymore. I tried putting the studs in the freezer and heating up around the stud hole. Still the same thing. Would you recommend using an impact wrench? I'm out of ideas and getting really frustrated. Any other ideas are welcome. Thanks.