325lb weight placed 8 feet behind rear axle is serious matter, so I would check everything with magnify glass.
The stinger you posted is 2.5" so I assume your truck has 2.5" receiver?
I assume the weakest point in the set is going to be receiver, but you'll be taking about 300lb off front axle and that will affect stability, wchich with TC sucks in the first place.
Stinger will amplify steering maneuvers when backing up.
I have 8' utility trailer that I was pulling with 4 foot stinger.
Small move on steering wheel would have trailer kicking by huge degree, so you have to be more precise.
