Some of the vacuum nipples on the valves aren't in the same position as our OEM valves. You might have to add a rubber hose to your hard plastic line to get it to connect. O'Rielly Auto Parts sells a Standard Ignition valve that has the nipple in the right position.
Some of the valves also have a top that can be rotated to position the nipple in any position. Personally, I don't see how it could have an effective seal with that feature.
