I'm tearing down my old redtop and I'm stuck on the main caps. How do you get them off? I've removed the front of cover, the crank girdle, the pistons, and the #1 cap (I was able to take a rubber mallet and hammer it off). The rest are wedged in place, so how do I pull them free? The block has a hole in it, so I don't care what happens to it, I just want whatever I can salvage from it.