I just looked close at the last photo and it looks like there is a bushing already in place.Look at the outside diameter of the hole and you will notice a circle about a 16th round that goes around the hole.That looks like the thickness of a bushing.Clean it all up and see if that is bronze
I cleaned the rust a little bit and took some more photos. Does it look like a bushing is already in there? If it helps I took a photo of the old engine's bushing.