Frankee,

What I would do is before you install it, Pull some vacume on it just to see how it works. No need to pre-vac it. When you take the mighty vac off, it will release.

PLEASE>>>PLEASE take some pictures so the rest of us can see how you do it.

You will have gone where no man has gone before you. Into the inner reaches of the unknown. Into the abyss of the CENTER VENT !

You will be the hero of this Forum. Deserving of all the accolades we can bestow upon you.

This of course, will only occur if you actually don't chicken out.

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1986 SDL
My Other Car is a Porsche. When it stops leaking, I'm out of oil.