I was wondering If it was a good idea to remove the factory overload spring (the short thick one one the bottom) to smoothen out my ride from the factory pack. It has two main leaf's and the overload one. I have a 93' 2wd Toyota that I will eventually put a race pack on. I also have a set of lift shackles that I took off ( the factory shackles are on at the moment). I heard that lift shackles will flatten out the leaf pack. Should I put them back on or leave the factory shackles on.