I tend to agree with Bob on this one. ProSeal is great.
If you're concerned about "gluing" the halves too tightly, you can do as I did. Use the thread technique just like we have for years, then simply run a bead of ProSeal over the joints. You can paint over it and it will barely show as it self levels and smooths itself.
Seems to have worked fine and eliminated a few potential leaks.... goodness knows we have plenty of those on these engines.