Alright, how much of a difference does your IFS conversion really make???

I have a 38 3/4 ton Pickup and I'm up in the air about the front suspension. What I was planning on doing was keeping the org, leaf spring and solid frt axle. I will replace the org. knee action shocks with high quality modern ones(Im thinking edelbrocks), replacing all rubber bushings with polyurathanes, and adding an anti-sway bar. How do you think this will compare against and IFS system?