Generation IV External Engine - LY6 Gen IV 6L Iron Block Question

Can anyone tell me if the LY6 iron block has siamese cylinders? I understand that the GenIII 6L iron blocks are not siamesed.

I have read that there was an oddball 5.3 engine that did not have siamesed cylinders. It seems like it was a sponsor here that made the thread, and said that they couldn't sleeve the block because of this. The ly6 does have siamesed cylinders.