It's a dearborn 19-3 snowplow blade with part of a dearborn 19-80 snowplow/dozer frame. You are missing the frame that goes under the tractor and cable or hydraulic system parts. It would mount to an NAA/hundred or early thousand series ford tractor and with a homemade bracket will bolt up you an 8n as shown on my 1949 with the cable system.
Kirk