I got my 1967 Mustang 200 CID several years ago from my dad. I have been restoring it. Sometime in the past he added a after market chrome valve cover, chrome oil filler cap, and a chrome air cleaner. The chrome has seen better days. I was stunned when I found out how much it was to re chrome these pieces. My dad still had the original valve cover and oil filler cap. The original valve cover's oil filler cap has a port on the side for a hose. The chrome valve cover has a oil filler cap that does not have a hose connection. The caps are not interchangeable. There is a Autolite 1100 carb on the engine. I have seen pictures of 67 200"s with the hose running under the air cleaner. There is no where to attach the hose that I can see. I asked my dad where the hose went. He said that he does not remember there ever being a hose attached. I am going to powder coat the original valve cover, cap, and the chrome air cleaner Ford Dark Blue to match the block. It is going to look funny with a oil filler cap with no hose attached. Where did it go?