my memory is not so fresh but is there a metal bracket on the passenger side similar to the one you would have removed from the drivers side? if there is i think you might have to remove it to find where the motor mount bolts in.
i also think the radiator for the v6 should be the same size as the v8 radiator.
i also think the radiator for the v6 should be the same size as the v8 radiator.