Eh, Morphodite would be a pretty good way to put it lol. Bore spacing would be one advantage for sure. I only considered doing a block for two reasons. One you cant get a block right now to save your life unless its aluminum. Two all the big companys have done the work for us with heads. Blocks would be far easier because you are only housing the components of the rotator. Heads are a whole other ball of wax, air does funny things at speed. It is far greater to design a quality head, a lot of times clean air wins, so you can have a head that flows more air, but makes less power because it is inherently a bad design if that makes any sense sir. at the end of the day, this is a touchy subject for sure. One that draws many opinions to say the least. I guess the question is would it be worth it to enough people to try.....
