Leaf Spring Removal - Easier Way?

I'm going to be replacing my leaf springs soon on my '73 Dart and was reviewing the repair manual. It states to remove the hangers from the body. A few questions...

1. Would it be possible/easier to just remove the pivot bolt from the front?
2. Same thing for the rear hanger. Should it be removed or just the shackle?
3. Can the bushings be replaced with the rear hanger still installed?

Thanks for the help.