The other way to lift the front is to modify your axle support mounts to drop your front differential. I did this by cutting the right side mount and welding in a 2" long piece of 1/2" steel bent to match the mount. On the driver's side I did the same thing with the bracket that mounts by the pinion, only requires a little measurement to keep it at the required angle. And for the upper part of the case, you can use a 2" rectangle steel, I would suggest at least 1/4" for strength, and grade 8 bolts of the proper length. Then to increase your lift to that desired 2.5" +, Just mod up some ball joint spacers, and again, grade 8 bolts should be used to insure strength. And if you want to keep your steering wheel straight, you can get a variety of drop pitman and idler arms from Chevy or Jeep lift kits to swap out for your stock ones.