+1 Sawzall
Finesse (c-clamp and a socket, and or rotate the frozen bolt/eyelet with a ratchett and use a hammer push to one side as much as you can, or pry bar, or with the aft leaf spring free from the shackle, leverge the leaf spring to one side, and or any way you can think of) the leaf spring within the perch to give you access (limited) to the bolt shaft (not the metal sleeve that the bolt is frozen into) and use the sawzall to cut through the bolt only and bam, less than 5 minutes later, for me, with only using 1 sawzall blade, the son-of-a-gun was out!