yes, but not a new concept as I understand it, Mihovitz has been using filled 4.6L 4V set ups with filled blocks to make 2500+ on Twins and run 6.0-6.20s in the 1/4 for a long while.
They must only be partially filled and not much. He does do a completely dry deck, but there are 8 coolant fittings in the valley and big one in the center core plug hole of each bank. That core plug is barely above the level of the block drain.


