Looks like a nice hunk of cow. Might look around for some wood chunks rather than chips. They last a lot longer.
Well, one must burn what one has! I'd bet it will be tasty. The good thing is that if it is actually chuck it will cook very similarly to a brisket. It does look like it could be brisket though.
Your briquettes are interesting, with the raised ridges. What brand is that?
Looks great! Nice smoke ring.
Sure looks like a brisket flat to me. How long did it cook?