I have the vacuum lines that came off a 58 235 with fuel/vac pump. The two threaded ports get the lines that are routed alongside the fuel and distributor vacuum lines around the front of the valve cover. I'm not sure at this point which of the threaded ports is IN and which is OUT, but that wouldn't be hard to figure out by moving the lever with a thumb over one port. My pump is an AC4080 with glass fuel bowl. I don't recall seeing a non-threaded port on the vacuum section, but could go check. If you'd like a photo of my pump, I could do that as well.
