This is what RK called for with there 5.5

If you got a 5.5” System

5.5” Front Track Bar Assembled Length = 32.625”
5.5” Rear Track Bar Assembled Length = 40.00”
5.5” Front Lower Control Arm Assembled Length = 23.250” 5.5” Front Upper Control Arm Assembled Length = 19 9/16” 5.5” X or X+ System Rear Lower Control Arm (2 Door) = 21.00” 5.5” X or X+ System Rear Lower Control Arm (4 Door) = 21.50” 5.5” X System Rear Upper Control Arm (2 Door) = 19.625”
5.5” X System Rear Upper Control Arm (4 Door) = 19.00”
5.5” X+ System Rear Upper Control Arm (2 Door) = 19.50”
5.5” X+ System Rear Upper Control Arm (4 Door) = 18 15/16”

 

Check this link.
Determining adjustable control arm lengths and loss of wheel base caused by lifting.

 

Thanks for all the input,, with all this been said by you guys,,, the best choice is if am not ready yet for all those upgrades,,, i think the best will be at least going with 4.5 coils from rubicon express... i got 3.5 with them now... i really appreciated a lot...... i can drive 80mph with 38s now and i be driving to colorado pretty soon.... i defiantly don't want have any problems if i was to lifted "6" ...