My late brother Paul ran a 503 LP for quite a few years in Beadle County, SD. Back then most small grain was windrowed and then picked up. I believe that's a Sund in the pics. Later he bought the new quick-attach feeder house attachment from Nelson Implement in Huron so he could use an 844 corn head and a 22.5' grain head. It worked slick. From then on all the small grain was straight-combined (that's what we called it). In the 2nd pic you can see the big round LP tank. Looks like his old Loadstar got its nose into the pic also!