Actually, given how heavy trailers have become and how light vehicles have become...I wouldn't put that behind any car on the market today. In fact, I wouldn't put it behind anything smaller than a 1500 that was built with all the towing options.
Cars used to be tanks, full frames, solid axles, and heavy steel bodies. Campers used to be basically a place to sleep with a small stove, oven, and fridge, and usually a bathroom. A 28' camper might weigh 5k.
Today's cars are ridiculously light, and so much smaller than they used to be, and they're set up for mileage. They have unibody frames that flex instead of rigid frames. Campers now usually have at least one slide, sometimes multiple, they come with stereos, tvs, microwaves, full bathrooms, and sometimes multiple cooking stations. Extra sensors galore for safety, a/c units, etc. etc. Even your ultra-light 28' campers weigh in between 6-7k with GVWs of 9-10k. Non-ultra-light 28' campers can weigh in at 8-9k empty.
Things have changed dramatically over the years. Cars and trucks are not what they once were, and neither are campers. That old Lincoln might actually struggle with today's 28' campers, while by comparison a 1500 would be enough to pull that old 28' camper with room to spare.