I have a 54 235 that Im installing the manifold back on. Of course Ive lost one of these bolts on here and they have an odd mushroom-like washer to go between the manifold spaces, in order to keep the manifold on. These bolts and 'retainers' can be found nowhere. Ive called all the major resto-places and they havent a clue. Any one run into this problem? One guy said go to the hardware store, but that wont make nice restoration, just some ugly washers piled up there, right? Thanks, Nick