Re: Hauling - V8
First, you'd better have a tranny cooler.... a big one, like a four pass, not one of them finned soda straws. And add an engine oil cooler if you don't already have one (not sure if a '98 V8 has one or not).
Second, look in your owner's manual, and it should give towing capacities based on engine, transmission and axle ratio.
You'll have to know the gross weight of the trailer; 10% of that should be tongue weight, and that figure will determine whether you need an equalizer hitch (probably will). Also, with an Explorer towing that long a trailer, you'll also need a sway arrestor.