Clarification to earlier post.

Skool, yes I do have the lower unit, intact but it is detached, why I don't know. Maybe to replace impeller, may just because there were visible bolts??? I really think they just started removing any bolt they could access. As I ppointed out in the picture both head gaskets are unbolted, gaskets missing, as well as the the square cover with a spring unit inside at the top of the head gaskets, and the sensors on them are loosened as well.

Skool:

Here are pictures of the cylinder walls... I don't see any scoring of them, they all feel smooth to me.