So I'm trying to replace the square upper motor mounts on my series II 3800. And let me just say, they're a *****. I've tried twisting, hammering, WD40, cutting, everything and they just won't come out. They refuse to move an inch. They are starting to degrade from what I can only assume is age(11 years 190k miles) and weather(car was kept outside for 10 years). Planning to replace them with some poly motor mounts that I already have and getting those in wont be too big of a problem. But getting these out? It's ridiculous. Any advice on people who have removed them before?