Hopefully someone with the correct answer will improve this answer, but a shortblock weighs 290. That is a 350 block with crank, rods, pistons, and cam.
A bare Chevy 350 engine block weighs about 200 to 250 pounds. When you add in the crankshaft, camshaft, headers, and the intake it is more like 500 to 550 pounds.
Just the short block, about 300lbs.
350, to 400lbs.
about 685 pounds dry
Roughly 550 pounds dry.
350, to 400lbs.
500+lbs.
450, to 500lbs.
260lbs
About 450, or 500lbs.
Pan to carb. 350, to 400 lbs.
The heads of a small block Chevy 350 engine weigh approximately 50 pounds. The use of aluminum over cast iron reduces their weight slightly.