It can be done but you will need to buy the drive shafts that go between the inner and outer rows, get the needed sheet metal and plates that go between the gathering chain sprockets for each row, cut the main beam and move in the cross auger end mounting plates, shorten the cross auger, shorten the sheets under the cross auger, get 3 narrow row dividers ect. In other words get a factory 4-30 head. I have a 8-30 head for a l2 that I have been thinking about making a 6-30 out of but the time to do it has stopped me, I wouldn't need any parts just time.