We had a Ford 1000 in 1975 that we wanted to use to plow snow but we didn't have any hyraulic parts so we came up with another way to raise/lower the plow - we ran a cable through some pulleys between the plow and the 3pt hitch. The snowplow was made out of a 40 gallon hot water tank cut in half and then welded together (top drawing). The push arms went back under the tractor and attached to an extra set of ears that hung down near where the lower link of the 3pt hitch attached. The cable attached near the top link and went under a pulley bolted to the lower drawbar, running the length of the underside of the tractor and then up through two pulleys attached to the front weight bracket. It then went down and attached to the plow. Raise the 3pt hitch and the plow came off the ground. The drawing is rough but it should give the general idea of how the cable was routed for anyone wanting to raise a plow but not having hydraulics.
Kevin