1970 K20 Shock help / advise

[Krex]

I am trying to get a better ride out of my k20 that have a suspension lift. I wish I put the lift on or I'd know the correct shocks to get.

It appears to me to be a 4 inch suspension lift it has just the leafs up front and a block between the ho52 and the suspension leafs in the rear. I didn't measure it but it has to be more than 2 inches and less than 6 inches. So I am assuming 4 inches.

What shocks should I get?

From low to high end. I don't mind paying a decent price. As long as they end up making a difference.

Thanks for the help. Looking forward to the input.