Part numbers from your radiator might help.
Original 22 inch radiator in a 68 would have the top to bottom bolt hole spacing closer to 13.25 between centers. That shoud for a V8 has part number ending with 614.
here is a pic of the radiator in the car. will the 614 fit this radiator. 68 radiators had the round tank. Does it matter? or do i need the 325 shroud? I didnt see any numbers on the radiator.