Use an engine hoist. That's the only safe way to lift this motor up and jacking it up puts the pan in danger of cracking. If you absolutly need to jack it up, cut a 2x12 to size and spread the load of the engine over the whole board but remeber, as you lift it up, more and more pressure will be moved to the back of the pan so only lift it up a little. You don't need to get it up very far and if you can get under it while lifting the engine, you'll be able to see in there. It may be that dampener and not the mount that is bad.