So, while I was helping a friend work on his mid-50's Nash Subway (yes, the car from the "Beep-Beep" song!) and attempted to disassemble the carburetor for a bulkhead. Nash is American, right? Oh no, these babies have British engines (Austin series A or B)! The vacuum port on the common rail is not metric (!), not SAE (!). What kind of.? All right, get Whitworth's wrench. Yes! Well made, excellent quality, beautifully designed, well labeled and in a strong pouch. There aren't many Whitworthβ¦