ok, so i dont ever use ac so i removed it, while i was at it i started cleanin up engine bay so i pulled my dash out to take out the ac condensor... so i pull off the dash and find a 40/40 prop valve inside it... haha but any way once i took out the condensor there is still a hole in the bok, what would be the best way to cover that hole up in the box (not the fire wall, thats getting welded and shaved shut)