how to port swirl ports

I read this, went outside and checked my 89 heads and wouldn't ya know it they have the casting 4448308,,,, so i guess i have a good set. I had to throw the block away due to the clown that sold it to me said it was good but I found a crack in the lifter valley, and i had to put her down. So I guess i can start the slow process of port and polishing them.

kevin