Skillet,
check the valve cover gaskets it should be dry under the lip of each valve cover. If you cant see run your fingers through there and see if its dry.
There was someone that found a wet exhaust port during a header swap and it was a bad valve stem seal. Spark plug was clean and there was no noticeable smoke coming the tailpipes. He was able to change out the valve stem seals w/o pulling the heads.
If you can smell it you should also look for blue smoke from the tailpipes on initial or cold start up.
