I did it when I owned a 1480. It was old enough that it was before IH had changed to the electric/hydraulic valve. A company made a "Big Shaver" kit that you could convert your combine over with an electric/hydraulic valve......they supplied the valve, hoses and directions. Do a Goggle search for "Big Shaver header control" and you may get lucky and find one for sale. Also, I don't know why you couldn't go to a salvage yard and take one off an newer machine and convert your machine.