Yeah, I think the Canton
oil pan capacity has confused several of us. I put 8-1/2 qts in mine last change and it's riding about 1/2 quart over full.
I had an experience a long time ago with over-filling a Pontiac engine. If it's overfilled enough to affect the engine you will start to see your
oil pressure guage fluctuating due to the
oil being aerated by the crank - it will be pretty noticeable. If not so full as to be aerating the oil, being over-filled somewhat shouldn't hurt anything otherwise.