What a PITA! Each front spring mount has no less than 5 rivets holding it in place - 3 on the side and 2 underneath. I went to HF and pissed away some money on an air chisel. It did make a hell of a racket but not much of a dent in the rivet head. I found the best way was to grind the head down flush to the frame and then drill it out.
The two front mounts are out and now on to the rear mounts with only 3 rivets each, but the are all on the bottom of the frame.
After this everything else will seem like a blast...