I have three of the four pins out (both on the left side and one on the right side). If I cannot get the 4th pin out (why is it always the last bolt or pin that is so hard?), I will drill the hole. I do have the clamps off...they are wire clamps...I have not seen something like that before.
The last pin is loose, just hard to get it out. Oh yes, I am having trouble getting the adjusting screw out too. I tried my impact screwdriver but no luck. I put a lot of penetrating oil on it and letting it soak overnight. I don't have much for heat...just a propane torch..but I did try some heat too.
Good tip on getting the brake out. The brake on the otherside had rusted in two pieces, which made it easier to get out. Yes, lots of junk on both sides.