To Caddyman’s good advice, I will add that the ballast weight should be secured directly over the drive wheels–which in the case of your truck are the REAR wheels.
If the weight is placed toward the rear of the bed, it will result in a “pendulum” effect when cornering on slick surfaces, and will actually help to induce spin-out.
If the weight is secured above the drive wheels, it will help your traction, even though it will tend to increase stopping distances. If you want to know why the weight must be secured, think of the term “loose cannon”. That term was coined by the Royal Navy of old, and it described what happened on the ship if one of those very heavy cannons managed to break loose in heavy seas. It was not a pretty picture, nor would it be in your truck if the ballast weight is not secured.
Incidentally, just about the only front wheel drive truck was the old VW Rabbit-derived pick-up. Yours, just like every other truck on the market nowadays uses the rear wheels as the drive wheels. The only exception would be trucks that have 4WD.
Between tools, hitches, straps, and other things I generally probably have ~100-200# in my bed even when “empty”. I’ve never had to load sand bags or more weight.
I think it’s viable if you travel in areas with an empty bed that are generally slippery (rural MN, gravel roads, and so on). If you are pounding the pavement in the metro/suburbs that’s treated beyond belief it’s probably a waste of time and energy to load more weight in your truck. Once those roads truly get covered with snow and compacted ice, it’s a full on storm and you’d probably be as well off running 4WD.