Oil drain holes

I was told today that I need to clean the drain holes from the head to the block. Apperently my oil pressure problem is due to the oil being trapped in the head. He said to use pipe cleaners. Now here's my question, where are these hole? Am I going to be able to run a pipe cleaner from the head all the way to the oil pan?

Anyone?

Dear PLKELLEY:
I have a standard response to your question which I once heard in a pool hall in Austin, right after a big fight:
"Ain' nothin', don't know nothin' 'bout it!"

Flunky
PS-It's not an answer by any means, but practice this phrase. It's useful. I think it originated with Ronald Reagan.

I feel the same man.