Fisher used to make a snowplow outfit specifically designed for the Series trucks, but haven't sold it for years. I have seen plows on Defender trucks, such an an EX-MOD up in Quebec, From a technical point of view, I don't suppose there are any reasons a Rangie with LT-230, or a Disco couldn't also move snow, though I'm not sure how much I would enjoy an airbag deployment. I'm only guessing here, but the 7 1/2 foot fisher on my F-250 probably weighs 700-800 pounds, plus the weight of the mount portions attached to the truck. Where do you figure the front end of a Classic, or Disco is going to be when the plow is raised? Don't count on your rear brakes pinching in much effort if you have to come to a quick stop either. That amount of weight hanging that far out the front is going to take all the chassis weight off the rear end. If it's an old series truck you're thinking about plowing with, have a look around for an old Fisher Suburban (not the GMC) Thats what Fisher called the plow made for Land Rover. It was pretty slick. All three cylinders were on the plow, and apart from the two pins, down below, there were just two chains attached to the truck frame up top.
Of coarse, you could always get one of those clear plastic plows I have seen on some jeeps, Suzukis and S-10 sized vehicles, but, they aren't much bigger than the plow on an ATV. Everytime I see one, I think "Show some pride man, get home with that thing"