Boat motors

I got about 8-900 lbs of boat motor parts yesterday from a regular of a couple years. There are several 2-cylinder blocks. Looks like the only iron is a little pin that is easily cut off and the piston sleeves. Any tips on getting those sleeves out or just cut them with a sawzall? In the past, I've taken them as Irony-aluminum, but the way things are going, I'm maximizing what I get - within reason.