My guess would be that the valve/port arangements are probably designed around a headbolt/lifter arangement left over from B/RB engines(look at what the beancounters did to the LA smallblocks and you will figure it out). The valves are canted but thats where the similaritys end with Clevelands and BBC´s in my humble opinion. i could see how the chambers could have been narowed Boss9 or gen3 style but except for that im confident those engineners who designed that thing might be a whole lot smarter than most of us on this board.