I'm working off memory here but I think my GFs brother-in-law said no these engines are not sleeved.
theyre definitely not in the sense we normally talk about where the coolant contacts the sleeves and they can be removed with the pistons for an in-frame rebuild (in a truck). What the guy claims is there is a steel sleeve in the block, press fit in, because the iron can’t withstand the pressure. I think that’s incorrect
they do make sleeve kits for these engines but it requires boring the block out to fit them