I must be missing something.... Jeff's coil spring spacers are close if not cheaper than a body lift. Add the shocks and the kit is over but the lift is done right with no issues or strains to the steering. No fear of safety issues due to the seperation length between the body and the frame. No cutting away or adding to the shifter or surronding areas areas. No extending of brakelines, fuel filler hoses, etc. No fabbed up bumper mounts.
Granted I have used the body lift in conjuction with spring lifts. Trying to keep the body lift to the most minimal amount of lift is a must in my opinion if you plan on wheeling it much.
That is not to say that it is not possible to create a body lift that is safe and can get the job done. Another factor to consider is the laws of your state too. Some states have outlawed these as well as SPOA lift blocks on the front of on the road 4wd vehicles.