1937 Buick 90 Limited Vacuum line routing in Buick - Pre War Posted November 19, 2012 · Edited November 19, 2012 by idrjoe_sandiego correction on Hyperlink (see edit history) Ok. I finally found a pretty good rendition of the details on this for all who may want to know. 1). Point your browser at this web site:1937 and 1938 Buicks www.1937and1938Buicks.com 2). Scroll down and click on Volume XIV Issue 5 (May-June 1996). You need Adobe Reader to view the issue. It starts around page 19 of the PDF file.OR you can download the PDF file directly. Just click to save the file then use Adobe Reader to view it--http://www.1937and1938buicks.com/The-Torque-Tube/Volume%20XIV%20Issue%205%20(May-June%201996).pdfThey have a 3-4 page article with details and pictures. A few details are missing here: the exact diameter of the tubing used and what color they were (if they were painted). Thanks again to all for your contributions.