8 3/4 rear end confusion

srt12-340, I keep reading that the cone type has a thrust block and that the clutch type has the buttons and pin. These are very new terms to me and I'm not doubting anyone, just a bit confused. On page one of this thread, cudamark stated that the cone type has a spacer which is just one piece and call fall out, making it seem like the cone type doesn't have the buttons with the pin. I'm gonna shine a light inside the axle housing tomorrow, I just don't know what to look for. Dan, could you explain what you mean by the nut adjuster? I'm not too sure what that is. Thanks everyone