ok now my trucks already lifted but my question is how come people dont just do(97 f250) drop brackets, drop pitman arm and blocks under the front leafs like the rear?...
This diagram illustrates the forces the vehicle encounters during braking. The front lift block sits in a high-pressure area and as a result could easily be ejected from between the spring and the axle resulting in complete loss of control over the front end. This only intensifies as tire sizes become larger due to greater leverage
Welding front blocks or building tall perches creates a high leverage point that creates more stress for the leaf spring. This diagram illustrates the forces the vehicle encounters during cornering (shown turning left). The lateral force is now intensified as much of the vehicle's leverage is placed high above the axle. Axlewrap during acceleration is also compounded.
The only thing worse than having one block in the front is having two! Not only has this truck raised the leverage point by creating a taller perch, but having a loose block resting between the spring and the perch is a recipe for disaster. Seventy percent of your vehicle's braking power comes from the front. Although the blocks here are only a few inches tall, they can easily distort the leaf springs and become deadly projectiles. Another note to mention is welding anything cast is terribly difficult and requires a skilled professional welder to lay a solid bead. So don't do it!