I'd suggest going out to the junk yard and finding an intact 85 and just pull all the vacuum stuff labeling it carefully. You probably don't need to take the the components (just the lines) so carefully label where they go. When I did my swap (617.952 into a 380SL) I pulled the entire vacuum system as one unit and moved it over to the SL from the donor car then mounted each component one at a time, extending and shortening each line as needed.
Here's an example of the labeling system I used to make sure the vacuum and electrical remained intact while working on it.
While you're at the JY snag a bunch of spare vacuum connectors. You might also want to have a spare check valve from the main vacuum line handy because the nipples tend to break off easily.