A Chevy 350 Engine weighs around 575 pounds.
The 575 pounds of the Chevy 350 engine is with the complete engine which includes the engine heads, intake manifold, pistons, crankshaft etc.
If the Chevy 350 Engine is only an engine block the engine block alone without any parts inside of it weighs 195 lbs which is still pretty heavy but not as heavy as it would be when it was a complete engine.
So the Chevy 350 engine which is made of iron is a pretty heavy engine and you need a good engine stand to hold it up or a good engine hoist to hoist the engine out of a vehicle or into a vehicle.
They are heavy engines but they also are good reliable engines.