I have been pondering on the idea of making my Blazer a dually. I don't know if anyone has ever done this, and I know I have never seen one. The only problem I see is that the spring perches are narrower on the dually, and because there is no room on the axle, I will have to move the springs on the frame. Possible, I don't know. If anyone has ever attempted this I would really appreciate the insight.