Need Opinions, Thinking about setting up Dual Shocks in the Rear??

[K10Dream69]

So the more I dig into my old girl the more $$$ and idea's go into it.
I've seen other post for similiar questions but my setup is a little different.

My shortbox is on 1 ton axles n 35's, I have blocks in the rear (like to elimnate soon) The truck ride is very stiff and was curious if I had a setup with 4 shocks in the rear if it would soften it up. The previous shocks were hammered so it already is going to ride better but for the price, $50 a shock it's not that bad taking a shot.

I will tow and fill the bed of this so it will get used as a truck. Would I benefit from this or not?? Any input experience is appreciated

I was thinking about using these universal Weld in parts: