yeah i had a plenum and cowl repaired by an old skool panel beater back in the day. still leaked water on the floor. must have been seal from heater ducting or seam sealer missing in the gap between ay

im still get to find a perfect pair of floor pans in any H or W series car. If they havent rusted in plenum or cowl the Fujkgi heater core has let go and rusted the passenger side floor!