You might need to use a different kind of muscle for that, it looks like one side is pushed in.do you have a big spreader clamp or an old car jack or something?also, helluva score for $20!!
I am so jealous of these finds you folks post! Here in Canada I'm not sure I have ever seen even one kettle sitting out at any of the hundreds of yard sales I've gone past over the years. Maybe that's a good thing - I tend to get a little compulsive...
That's an amazing find. It'll cook great even with the funky handles.