My 89 f250 4x4 has a real bad rake to it and I hate it what are my options for at least leveling kits and maybe even lifts I know it had leaf springs in the front but what is weird is they look upside down because they curve down is this right? Can i add leafs to it for the lift? What size lift do I need for 35's

 

Yes the front leaf springs are supposed to have negative arch. Personally I dislike the TTB set up because they wear tires terribly and they lunge when you hit bumps. I would opt for a straight axle swap, but if you plan to stick with the TTB then look to companies like rough country, tough country, rancho, superlift, and skyjacker. You need at least a 4" lift to clear 35" tires from the body, and to clear the frame you need rims with a 4" or less backspacing, which will cause the suspension to have more stress and wear out your 35" tires faster than you want.