I plan to have a vacuum gauge on the dash, so I needed another port on the vacuum tree, but they were all in use. So I removed the factory plug from this location & installed another tree from a JY engine, capped the nipples I don't need right now, and shortened the brake booster line to fit here.
Au-Ve-Co 12209 Vacuum Cap 1/8" (25pcs/box)
Au-Ve-Co 4440 Vacuum Cap 3/16" (25pcs/box)