Here's a really nice vacuum advance line from a Chevrolet V8 motor. The fitting on this line threaded into the vacuum advance diaphragm on the distributor, then ran along the right valve cover to a rubber hose hooked to the carburetor bowl vacuum outlet. This line was with a bunch of Chevy parts in the box of a 1959 348 tri-power manifold I bought. I know I have seen these on the small block V8s I had back in the day, so I guess they could have been on the big block W motors as well. Anyone out there looking for one of these will know it's application. This is the real deal as it has the hose stop rings on the carburetor end. It will make a nice OEM addition to your 50s early 60s motor. If someone knows for certain what motors & years this may have been on, send me the info and I will post it on the auction. If you need to reach me my cell# is: 412 607 3791  Chilly