In other words the punchline to what I'm sure this is leading to?????

Yes you can build a Hemi starting with a 440 block, but you'll spend more than the cost of a real Hemi block in custom machine work and parts to make it work (no joking here!), and when you are all done you'll have a block that is not as strong as a Hemi, and that will ALWAYS be a 440 block.