Upper Control Arm bolt

So you got the nut off but the rest of the bolt wont come out of the bushing sleeve ?
Disconnect upper ball joint from spindle so you have full range of motion on the upper control arm. This will give you more room to work.
May be time for a torch to burn the bushing out and loosen the rust
Remove brake line and put clay or some type of heat barrier behind the eccentric bolts to prevent paint burn.
It's disconnected from spindle.
I don't have a "real" torch, just a propane one. I've held the flame to it for long periods of time and beat on it while applying heat. I guess I'll just keep going at it that way. I've had some stubborn rust welded nuts and bolts in the past, but this is ridiculous. I might try getting my angle grinder in there with a cutting wheel..If nothing else, maybe cut in enough in a few places to weaken it.