I have available to me used front and rear 4" leaf springs, u-bolts, and IFS steering box for a reasonable price for my 1985 4runner. Can I just bolt the springs and go, or do I need to install the IFS steering box and high steer? Do I also need to change the placement of the spring location and longer hangers? I'm a new at this and I thought leaf springs and longer shocks would do the trick, but others are telling me that it is a much bigger job...welding new location for springs, longer hangers, IFS steering box and high steer. I want to do this inepensively, but effectively.