I've got a hiniker 8' hopper on the back of my 96 F250, just set it in last week. with that thing partially loaded it is all my trucks 12 year 205k mile springs want to hold. I'm going to build some heavier springs with mine and the rears off a wrecked 3/4 ton, but do the Firestone Ride Rites work well on a truck with that much weight in the bed. i know they help a lot for trucks pulling heavy trailers i've just never been around them on a truck with a constant heavy load on the truck itself. Thanks.