I saw that this morning. I asked the seller about the cracked front cover and here's his response:

"On the 55, it's a one piece timing cover. It contains all of the mounting points for the alt, p/s etc..... But it's different from the standard 500 v8 because of the supercharger. The alt mounting tabs are the broken part of the front cover. It's still solid were it covers the timing chain. "