When I bought the car. The previous owner had the vacuum lines all messed up. Two years later and I am still straighten them out. I did stop by the parts store and picked up a couple small check valves and vacuum hose. I would like to find some bigger check valves for some of the bigger lines. I do plan on changing my intake setup to blow through this winter. So all that extra crap will be gone. There will be a big problem with vacuum after I put the bigger turbo and intake on though. I will be loosing the A/C for a while next year until I can figure out how to make a bracket to work. A idea I have had is. Some of the older Ford straight trucks with diesel engine have a small electric vacuum pump for the vent system.
You can see why these cars are vacuum line night mares.