Installed my rancho's today. Very easy job for do-it-yourselfers. Takes about 30 minutes each.
1. The rancho's come out of the box in the compressed position. They require the shaft to be turned 1/4 turn to release them. DO NOT release them prior to install.
2. Install the lower bolt first. Then with boot and liwer washer/bushing in place, line up the top shaft with the hole and release the shaft (1/4 turn).
Then tighten all nuts/bolts.
If you release the shaft before installing the shock it make the job a bit harder but its still doable.
Hope this helps!

Overall job hardness rating...2

if you release the shaft first...3.5