I'm changing the brake pads in the rear. On the driver's side caliper, the top pin won't slide, so the caliper won't fit over the pads. I'm about to get some bolt unfreezing spray stuff, and soak it. Do you guys have any other suggestions? I have to get this done before 6AM tomorrow!

87 rx7, larger caliper style

 

I got some liquid wrench and a big c clamp, soaking the pin right now.