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.