How do you install a timing cover seal?

[Todd Sgamba]

What's the trick to installing the 2 piece rope packing/seal in the timing cover and the oil pan on a model A? I've been told to cut it off flush with the cover and pan surfaces. I heard if I do this, it will shrink and leak. I've also heard to not cut it at all. If I don't cut it off, there's no way to properly tighten the oil pan down. Hopefully someone can help. THANKS

Todd