The problem with the lift IS the front end profile. It channels air the hood, which has a shorter distance to travel to the back then over the top, and it makes lift.
Short of stopping the amount of air that enters under the car, you'd need to remove the hood to stop the path of air from traveling over top and creating some sort of turbulent mess of air, which would probably increase drag.
Making a spoiler to create downforce on the steering rack would negate some of the lift, but then you're channeling a lot of air up into the engine itself, which would increase drag.
What's the end goal you have for your project? What do you need to prove on a base level?