If you do what you are contemplating, you are going to end up with at least 5" to 6" of lift in the rear (the diameter of the axle tube plus the thickness of the spring pack).

The most that you will get out of the front is probably 2 1/2", 3" if you remove all the movement in the front axle. This will result in a totally jarring ride and probably some very short life for front end components.

However, even if you make all these changes, the pumpkin is still going to be the same distance off the ground. All you will have done is raised the body relative to the axle.

The easiest way to gain some ground clearance is larger diameter tires. In fact, if you are talking about ground clearance under the pumpkin, the only way you can increase that distance is by going to larger diameter tires.