The data tag has a gross weight of 16k. The truck weighs, maybe, 6k and a 4k car on the flat bed only comes to 10k. The 6k of car and trailer it may pull only adds around 500# tongue weight, so the gross would still be less than 11k. I would get an accurate weight from a local truck scale and then remove a leaf at a time to measure ride height and hopefully get a little softer ride.
Click on the link at the bottom of my last post and it may answer some doubts about my past experience with trucks...
As for the forum name, my wife calls me that because I have a "few" vehicles I hope to someday complete...

1938 Chev coupe street rod
1952 Chev flat bed
1967 GTO
1967 Camaro ss/rs 350
1966 Chevelle SS 396
1970 Chevelle SS 396
1969 GMC K10
Link to photobucket pics of some of them.
http://s1357.photobucket.com/user/S...&_suid=13640747996500346218371107401