Chris,. The kit you bought is designed for a 1/2 ton. I'd be concerned about it failing if you hit a pot hole or curb, the extra leverage of your big tires may rip the guts right out of the box.
Maybe I'm worried about nothing...
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD