Hammer... Put a chisel somewhere on the eye bolt which when hit, will cause counter clockwise rotation. Lightly tap with a machinist hammer. Bronze and SS shouldn't seize like this. when you replace the eyebolts, make sure you get the real thing 316 SS with a welded eye. Please please tell us they don't look like this:
Make sure you clean everything well, and spray corrosion block, lanocote, tef-gel something like that when you put it back together. The next owner will thank you.