That was originally for the windshield wipers. Some of the 4000 and 6000 models ran a tee off the manifold there, one to the wipers and one to brake booster. However that was for the big boys, I don't know how that would work on your 235. What are you using for wipers now? You will need enough vacuum for wipers (unless you upgrade to electric) and your distributor. A question has been posted here on how much vacuum is needed when running a booster system. Look through the archives (search) for this topic. Remember anything can be done with enough $, time, and thought.
