It probably is oil and coolant...and this is more than likely where its at...
That is not normal. Eh, don't worry about the oil. Oil can usually be found down in the recessed areas and is normal. But when the coolant builds up, well...thats what happens.
Your plenum should be fine, but it'* recommended you get the upgraded kit with gaskets. Do lower and upper intake gaskets plus the plenum and you should be fine.
As far as the phone number, your welcome to post it, but remember, Google pretty much has full access to this forum and it indexes everything it sees. Including phone numbers. Hello SPAM TEXT! PM it instead. This includes emails.