Genuine suspension is pro-comp springs with the lifts thru 6 inches and super lift on up.They are just the basics no steering correction no brake lines and all block out back.
They come with eliminator shocks which are junk.A pro-comp 6 inch kit with blocks would come with a 3 1/2 inch block and a add-a-leaf to get you the 6 inches but genuine would only come with a 5 1/2 inch block.Less block less axle wrap.
It is a good kit price if you can talk 4wpw into upgrading the shocks for ES3000 for the cost difference between the eliminators and 3000s. You will also need a GM400 steering arm.You will need extended brake lines if you go with 6 or more inches but can get away with just the drop brackets with the 4 inch kit until you get rid of the sway bar,open packs up etc.I am running a 4 inch pro-comp kit on my 85 burb and I am happy with the ride after getting rid of the sway bar.Hope i was of some help /forums/images/graemlins/thumb.gif