LA blocks

This is just a thought not based on fact but I would think or recall that the early engines possibly had more metal cast in them. it would make sense from the mid 70s on the block would be cast with less material to save money. I seem to remember Chrysler always going bankrupt and being bailed out by the govt so they would have cut costs everywhere especially after the govt. got involved. We know now when the govt gives you money they essentially tell you where to trim fat. I would think the magnum engines are even lighter and thinner also. Just a though though I can't back any of this up.