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I checked this morning to see how I had actually attached the hose. The memory all came back. It was a relatively easy install once I made adapters using PVC couplings. For the drivers side I used 1 1/2" sch 40 pvc coupling. With about .010" shaved off the ID it fit perfectly over the outlet of the center housing. The corrigated end of the vacuum hose which is just under 2" OD fit snugly into the other end of the coupling. The other end of the hose was not corrigated and smaller and fit perfectly into a 1 1/4" coupling I may have had to shave a little off the OD to get it to fit into the dash vent. I used a 90 degree coupling at the housing on the other side. The whole project took about 3 hours not including trips to HD. Hose sizes differ and may require different mods to the couplings but it was a fun project. Kinda like putting a puzzle together. BTW I just looked at the metal pan and I have 4 - 4" round openings spaced across the length of the dash. I also checked and I did shave the OD of the coupling at drivers vent. On the other side I used the corrigated end with a little tape to make a tight fit. It took me less than 5 min to put it all back together with all 4 ends completely disconnected.
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