yeah, Bad Dogs I hear are good, and that you can put them over the factory ones, but if the factory ones are rusty, then they need to be repaired/patched first or removed and replaced with these. I I think they way blok did his with thick heavy steel is probably the ultimate (the youtube link I posted earlier).
I took the OEM ones off and welded the Bad Dogs on. I suppose it depends on the condition of yours, but mine were pretty bent up and there was rust inside the frame rail.