Cool, good to know. I am going to put in 98 4runner 16" springs so it will be able to handle to weight, plus new shocks. I just want to fit a roof top tent without any problems. Thanks for the info.
I'm 280, and I just walked out to my front drive and stood on mine. It flexed a touch, so I'd guess if you distributed the weight properly it could handle 350-400 pounds. Way more than your stock springs will enjoy, anyway.
The load in my avatar was about 200 pounds probably, and was on a pallet rack bolted to the fiberglass through 6 rubber bushings.
Can I see some pics of how you mounted this? Was thinking of something similar for mine.
Mike