I've weigh several 440 with no the cam bearings, oil galley plugs and clean up some by hot tanking that still had some rust in the water passages, they all weighed between 215 to 225 lbs. on a 1000 Lb. certified warehouse platform scale
On the same scales a 4.495 rough bore World wedge block weighed right at 320 Lbs. bare with no plugs or cam bearings
I have 4.95 rough bore Koleno high nickel cast iron and Bulldog cast grey iron block that I haven't weigh yet so it will be interesting to see which one weighs the most