the ford racing "302 serpentine conversion kit", which is used for putting ANY 302 into a fox, comes with water pump, timing cover, oil pan, and balancer. how is this relevant you ask? well the timing cover has a dipstick hole in it, it fits like 68-00 302's or something. anyway, yes there was a little tiny cup plug that you could either put in the block or the timing cover depending on application. so they are out there somewheres.