In his 31 fights Wolak has only ONCE faced a legitimate knockout artist in Carlos Nascimento. I really doubt Nascimento has the power and accuracy of Kirkland, though, and if you consider that Wolak's style (coming forward throwing non-stop and creating numerous openings for your opponent) is perfect for Kirkland, I think that this will be the first time Pawel will get stopped.
Don't let Nascimento's record fool you, he was stopping complete bums. Everytime he faced a name he was stopped.
I haven't seen the man in action, I assumed he's a good puncher based on his KO percentage. If what you say is true, it only strengthens the point I made. Wolak will be in real trouble if he ever meets Kirkland.