I was wondering if any one knows where I can find more info on a hitch for an older JD tractor. The hitch mounts under the belly of the tractor and has a half radius that goes behind the rear wheels of the tractor. It has a slide on it that let"s I"m assuming 2 four row planters. Not sure what model tractor it went on it was left at my grandfathers farm when my mom bought it. My dad thought maybe they used it on a 720 or 730 JD. I"ve seen pictures before of one of these on a 5010 or 5020 i think it was. But can"t find any info now. Any input or places I could find info on this would be appreciated. Thank you.