Another board member has a pair of brake cylinders that I would like to purchase. My parts manual lists part numbers for PA28-140, 150, 160, 180, 235, and 200R....but not 151, 161, or 181. Need to cross reference to see if they are the same or equivalent part numbers. I need the main wheel brake cylinder housings for Cleveland 30-55 brake assembly. Piper part # for the housings in my book, for my PA28-140, is #753-920. It appears they are also available new. Just need to verify that the seller's 77 PA28-151 has this part number. Thanks in advance.......