The best lift would be a coilover kit from Downey, Fabtech, or others make them as well. A spacer would be cheaper and work well, but beware. Make absolutely certain you get a spacer kit that installs as part of the coilover itself, requiring you to compress the spring and fit it between the coil and the top of the coilover unit. If you get a spacer that installs between the coilover and the frame (not requiring disassembly of the coilover unit), you will go through ball joints about every 3-6 months. This is because the shock is what limits downtravel, and if you move the whole shock down with a spacer, the suspension will droop beyond the limits of the ball joints. I've been out of the loop for a while, so I can't remember which brands to get, but I think Cornfed and Revtek are the right type.