theres a thread somewhere on it. But i have a lot of tools, so i heated them with a torch, and used a air hammer with a sharp chisel to blow the head off, then i used a punch tip in the air hammer and punched out the rest of the rivet. Then i cut the crossmember apart over on the passenger side so it would be easier to take it out.
Yeah, if you are doing it right you will get pissed. I did the same thing with the grinder and an air hammer, some came out easier than others. It feels good to throw the crossmember across the room when its out.