I seriously doubt that dual wheels would fit between a 6 row 30" frame. We run a 6 row 30" on our 8820 with 30.5 X 32's. It has axle spacers and the deep dish of the wheels are on the inside and it is the same width as the head. 6 rows is WAY to small for our 88, but it's what we have to work with for now. Probably too small for a 9600 too.
You can do this, I guess but you will need to take your duals off and have the centers cut out and re welded to change the offset of the duals. There is a man near Archbold, OH that can do this, but I cannot think of his name off the top of my head. Give me a day or so.
I just bought a 9600 with 30.5s, and its going to be right close with a 6 row on it, but its what I have.