HRL's puller idea is a good one but with all that rust I'm not sure if you wouldn't just tear the head off that spring mount if you get too medieval. It still might be worth a try to apply heat and some PB and give it some reasonable tugs/taps with a slide hammer to see if you can get any movement. But if that fails, X2 on the cutoff wheel. If the nut/bolt spins freely you will have to slice the nut in half to free it from the bolt. Get the thinnest wheel you can and go for it. Good luck.
SimS
This is all new Territory for me, I have no diagram of how this fits together and I cant find any either , but it sounds like what being said is that this "spring anchor" is removable and the bolt not part of that. With the anchor removed that would expose the bolt head. Am I on the right track here?
I'm paranoid about destroying anything because I dont see many parts being sold new or used.
