the only problem with that style of spacer (spacer on top of the spring pack) is that you have nothing to limit your downward travel since the downward limit is built in the shock. with this lift, you roughly add the amount of lift to your downward travel. this may sound great but you'll eventually destroy your ball joints. if you run this setup, add limiting straps!!!

trust me, i've seen this setup and i've helped replaced the ball joints and CV axles on these tacos/4runners.