Ok, so I picked up a front axle. Trying to remove a set of leafs attached on one side. Tried heating up the nuts on the U bolts but no such luck, so I got out the sawzall. Cut through one bolt and it made a loud pop and the gap spread out about a 1/4". Did the other bolt and the same thing. So my question is how much spring can be left in these rusty old things? They are not attached to anything at the shackle ends, and there doesn't seem to be much arch left to them. Just don't want to bust up my pretty face if I can avoid it.