When it comes to installing springs, some trucks will be more difficult than others. In many cases the bolts may be corroded in the spring eyes or the shackle eyes and will need to be persuaded to move with percussion or heat. On some trucks the front spring bolt is impossible to remove without cutting or removing the fuel tank because the springs were installed before other components during vehicle assembly. The corrosion will be fully dependent on where the truck was used and how much salt they used on the roads. The front spring bolts will be obvious if you check under the truck and determine the direction that the bolt head is facing. In the best case scenario it can be done as a driveway project but in the worst case it will require cutting with a sawzall or a torch.