I am considering going to 20" rows for corn and soybeans.  I currently have a nice, rebuilt JD 7000 12R30 with a Jamison drive and custom-built transmissions.  My thoughts are to find a similar aged JD 7000 8R30, perform any repairs/maintenance as necessary, turn the lift wheels around to the front (remove the fertilizer bar if it exists), and swap the row units and transmission system.  I may consider keeping the row units and adding (4) more if they are in good condition, too.

Anyone try this, and if so, is it a worthwhile project?  Not looking to debate the merits of 20" vs 30" agronomics, just wondering about the mechanical feasibility.

I just returned from a trip to Brazil where corn and soy are planted on 45-50 cm rows (17-20 inches) and narrow row corn heads are common there.

Thanks!