Sticker info on 2012 F350 SRW LB Supercab (not crew cab) Gasser (not diesel)
6,000 front plow axle 7,000 pound rear 11,000 GVWR Payload not to exceed 3,829
Truck - me, wife, and a full tank of fuel Front 4,440# Rear 3,200#
Truck as above with Northstar Laredo wet Front 4,820# Rear 6,120#
Height ground to top of AC shroud 10'6" when loaded on truck
No matter what you are reading, I would encourage you to actually look at the sticker on any truck you are considering. Lots of folks get a shock when they go on the Internet and then see what they actually have on their sticker.
I don't think that STC is only 3,600#; given NorthStar is posting a weight of 3,176 dry, I bet you are over 4,000 wet, if you add the normal 800-1,000 pounds. Just my two cents. The NorthStar site shows a dry weight of 2090 dry with no options for our Laredo, but optioned and wet our camper, etc. ready to roll adds 3,300 to the truck. :)
Steve