My truck needs some guts...

[bitchin85]

my dad owns a construction company and i am constantly hauling alot of weight. i have an 85 longbed 2wd 1/2 ton. it has stock half ton leafs and coils right now and when i load it up, sometimes the back wheels tuck onside the fender wells... (i haul alot at a time) and when i hit a bump it just sucks.. i was thinking of finding a 3/4 or 1 ton in a junkyard and swapping out all 4 springs. if i do this, is there anything else ill need? and what do you guys recommend? easy, straightforward swap?, or is it going to be tricky.. do i need special tools to get the coils out or...? thanks guys tell me what you think