cast iron

I have a shot at 2 cast iron plenum's from a steam boiler well over 1500 lb but less then 2000 lb
there situated in a hall of 7.5 feet high with pipes over head and at best 4.5 wide .It is 1/4 inch thick , or even a touch more .If it was sitting out side & with my best mallet looks to be a all day busting . In the hall it's in , thinking might be out a my realm . I have busted down plenty of them but not this thick and in tight area . At a optimistic 2000 lb - $240 is it's value. I tested a spot and it did not sound like it was going to bust

Thats a lot of swinging,

Can you drag it outside? Load entirely on a trailer/truck