I did this a while ago and don't know if any of this will help.
-Go through the wheel well after taking the wheel off. this gave me sufficient room
-Use a Punch to get your hole centered before drilling. this give you a hole for the bit to rest in(no walking)
-Use a left handed drill bit (cuts when turning left)
-Soak studs in PB blaster (or similar product) for at least 24 hrs prior to starting
- Used the torque from the drill on the extractor it works well....
-As always go slow, use a lot of lube, and good luck