Another couple options that you have are
a) add a leaf for around $40-70
B) super springs
C) 5,000# air bags.
If you have not purchased a stabilizer hitch before I highly recommend equalizer stabilizer hitch with the solid bars. They cost more than the chains. But are 10fold safer. Chains will stretch and break and when one side breakes let's just say its not pretty.
I have this
http://www.pplmotorhomes.com/parts/rv-hitches/equalizer-sway-control-hitch.htm for my camper and it is hands down amazing. They run 400-600 if you find a deal online. Fair warning look at the shipping cost. As each place will be different and effect the bottom line. Between bars, hitch, brackets it is easy 150#+
My Tahoe I have setup with air bags and the stabilizer hitch. Hitch for the camper, bags for boat and utility trailers and such. I simply hate when headlights point to the sky.
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Not Penny's Boat
1993 190 Horizon 5.0L EFI http://www.smwebhead.com/phpBB3/viewtopic.php?f=3&t=111361977 14' CMF Skiff SOLD
2015 Emotion Stealth Angler 11