engine weights 383 vs 318/360

That old 6 pack intake was wacky heavy! Being cast iron steel! Yea! Whew! Huff N puff!!!

What is the weight savings on iron to aluminum for the BB head? 50lbs. A head? The intakes are a Tidy bit of weight as well. Swapping out the water pump and it's housing is a good weight move too.