Unfortunately, I have to agree with "Center of Gravity" issue. A TC designed to fit a long bed truck, can't be safely carried on a short bed. If you go on the Lance Truck Camper website, they had a very good explanation of how COG applies. It is a matter of carrying too much weight behind the rear axle. This will lighten the load on the front steering axle. Which can be catastrophic.
If you can possibly work out a deal for at least a 3/4 ton the problem is solved. Otherwise, a sale of your present TC in favor of a TC specifically designed to fit a 1/2 ton would be the safest choice IMHO. Several TC manufacturers do offer 1/2 ton models. They are particularly good for rugged off-road operations. I expect some folks here can offer their experiences with some suitable 1/2 ton TC's.
