First things first.
Find out what it’s got now.
I know, it’s probably stock all the way around. But what I mean by finding out is, is it at original stock height, or is it sagged a bit?
Measure all the body mounts and find out what they are. Are they original rubber and look really crusty? Or are they replacement, new rubber or polyurethane?
Stock height for a body mount is 3/4 of an inch. Anything less than that, and even just installing new body mounts of stock height will “lift” you slightly.
Same for the springs.
Measure between the top of the axle tubes and the bottom of the frame rails at each corner.
Stock in the front is roughly 7 inches and stock in the back is roughly 6 inches. If you’re at that height, then everything’s in good shape under there.
If you’re less than that, then even installing stock springs will bring you up a bit.
I don’t think you said, but are you doing this to keep the tires from rubbing? Or just to change the look?