I can't speak for the equalizer hitch.
Personally I wouldn't bother with an equalizer with your setup. Waste of money. Just buy some sort of sway device and be done with it.
You really only need a Weight distribution hitch when your truck's rear end is sagging because of the trailer. These FF have really light tongue weights
I would measure on your truck from the ground to the highest point of the wheel well lip on the front axle, then the rear axle. Then hook up the trailer and do the same. How much does it move.. I'm willing to bet it doesn't. One other thing to consider is have you experienced the front of your truck "floating" when going over bumps towing? If not, then no need for a WD hitch.
I towed with a borrowed f150 4x4 scsb for the first summer I owned our trailer. The WD hitch actually made the towing experience worse, so much so that I removed my WD bars halfway through a trip.
What I'm trying to say, is that WD hitch is meant to transfer weight to the front wheels of the tow vehicle.
Although my trailer has almost half the tongue weight as yours, so you may want to try one more trip, and see if you experience the bouncing. then make your decision.
20XX 3/4 something TBD
2010 K-Z Spree 318BHS LX