Casting Numbers on Engine

I have a motor and don't know what size it is. I was told it was a 360, but want to make sure. I have look up many casting number with no luck. I pull this number off the front of the engine on the drivers side.

"5M318" "03141357"

and I pull this off the side of the block on the drivers side.

"4323330318-13"


-r