Got one of those Diablo Steel Demon carbide tipped blades. It was tricky getting the saw in at the right angle, but it did the job. The rear shackle bolt was also seized, so I just cut the shackle and destroyed the bushing. I already had a set of upper shackle bushings from GM, and my OME springs came with their own bushings. I think I'm finally done taking this thing apart. Now I can start putting it back together. Then it's time to deal with the seized rear brake fittings. There's just enough rust on this thing to make it a pain in the ass.