Large valved 273

It's not just the valve hitting the block
It's the airflow hitting the top of the cylinder
But tell me this, wyrm....The bore is smaller than all the head Chambers. So will the flow be less with a 2.02 valve with the overhang being closer, vs a 1.78 valve with the same overhang .125" further away? IDK, but 90 per cent of the valve opening is not facing into overhang....