What is the weight of a 305 Chevy small block engine?

The weight of a 305 Chevy small block engine varies depending on the specific components and accessories included. However, a generally accepted estimate for a bare block (no accessories) is between 375 and 400 pounds. Adding accessories like the intake manifold, carburetor, alternator, starter, etc., will significantly increase the weight to somewhere in the 500-600 pound range.