V4 360 Chrysler kit

Says to continue to use the intake valves...to open a blind hole to the crankcase to the intake? That seems like the crankcase pressure would dilute your intake vacuum. Do them make compressors that use a V8 with 4 'dead' 2 cycle pump cylinders and a crazy cam? Mopar sells an A4 midget motor that bolts up to a LA pattern (drag version) thats based on half an LA motor, uses a W8-9/P5 head. Even a slant 4 looking motor.