Suspension Upgrades on 72 C20

[Chr1st0pherMcWA1keN]

Hi all, I am looking to upgrade the old suspension on my 3/4 ton C20. I have stock original Leaves and Old shocks. I'm looking to upgrade to stand hauling heave loads such as Metal and wood. And would also like to pull a goose neck and a regular car hauling trailer. I wanted to know what idea's and recommendations some you have on part etc. Also would love to see some photo's of some upgraded suspension if you have any.

P.S. Along with the leaves I have a Dana 60 axle and the truck is 2 wheel drive. Really just looking to Beef the rear for now.