Get a Propane torch, and load it it MAPP gas so it'll burn a little hotter. Jack the car up. Using the torch, heat up the bolt head, and nuts to the point that they are almost glowing. About 2 minutes. Remove and extinguish flame. Quickly, soak the bolts and head completely with pb blaster, wd40 or your penetrating oil of choice. When you heat it, the metal expands, and when you take the heat away, the metal will start to contract again, and when you soak it in penetrating oil, the oil will be drawn into the threads through the contratcing process. Grab your trusty Breaker Bar, or Impact gun if you're so equiped, and remove the bolts. Be careful, and let them cool before you touch them. They will be hot enough to burn your fingerprints off if you touch them. (don't ask how I know)