87 Four trac 350 Overload Springs

I have mounted a Swisher front end loader and my front shocks which are probably wore out wont support the frontend if I take a big scoop or even load 120# of mortor mix (4 bags). The front end drops enough so that I cant dump the bucket.

Is there such a thing as overload springs or shocks I could use to keep the front end up?

I have an unlimited supply of creek gravel Id like to recover but as is there isnt enough beef to support the weight