How hard is it to get the original upper bushing off? I just purchased HD Shackles. I'm planning to drill them out. Another Q. Will the new lower bushing from ORD fit the ProComp eye holes? The reason that I ask is I have a full set of replacement bushing from Energy Sus. and they wont fit the new springs only the factory ones. So the diameter is different from the factory and after market Any Info will Help me sleep at night! LOL Thanks KEN DANGIT it's not a bronco!