The LT tires helped, the heavy duty shocks helped, the rear sway bar helped, the fancy hitch helped but in the end the wife just wasn't satisfied and WE all know what happens then..
I really think that if it had been an 8' bed 172" wheelbase it would have been fine. The short WB on the light trucks is just a killer with the longer heavier trailers. I was well within the trucks capabilities on paper but real life is sometimes much different than "on paper" a fact I'm painfully aware of as a design engineer...