Front leveling

[delta]

Searched on here but nothing found. I have an 80 3/4 ton with 4" lift. I have the "chevy slope" and want to level the front with the back. I have all new springs and hardware in it so i really dont want to put different springs in the front. My buddy said hed get me some 1 ton springs but it might ride rougher than it already does now(i hit a dime on the road and i can feel it!) Is there a solution to this?bigger spring shackles? I really only need an inch or inch and a half to level out.