> I can hear what seems to
> be a slight vacuum leak, but I can't figure out where it's from - it could
> be the line running to the brake booster or maybe the valve cover gasket
> (which is leaking a little oil.) However in both cases it would have to be
> really small and I can't get a change by pushing or prodding at either the
> hose or the cover.

Matt,
    Maybe on newer engines such as this the following practice is taboo for
some reason, but on every car I've ever owned the standard practice for
tracking down a vac leak is to spray carb cleaner about the engine in places
that are suspect.  When the engine RPM increases, you know the carb cleaner
has been ingested, and you can ascertain that wherever you last sprayed is a
vac leak.
    I assume there must be some reason you're not using this method, though.
If you are someone capable of an engine swap, I feel it unlikely a
shade-tree hack like myself could teach you something.

   Good luck.
Reid