Do i need control arms?
 

I have a 3in rough country lift now. Im adding 2 inch rubicon express coil spacers and blocks to the rear of my jeep. Do i need lower control arms or will i be ok?

yes you do. bad idea using blocks though

the blocks are temprory till i get my leaf pack made.

yes... make sure you get them for a RE 5.5in lift... or 4.5 would be alright... 5.5 would be better if you ever came across a set of 5.5in RE springs and ditched the pucks... as for blocks in the back... if your on stock springs and a AAL then there already doomed so use them... save up for full springs later... if your just DDing blocks are fine... used every day... look under F150's and such... they almost all run blocks for lifts... dont let anyone tell you different... just look for yourself...

just because idiots use them doesnt mean they are good for your leafs. heavier duty leafs will take more abuse but light duty suv springs will not.

Just because idiots use them? Most fords have factory blocks, And I ran 4 inch blocks for years in my chevys and never had a issue. The pa inspection law is 5 inch blocks in the rear. Nothing wrong with using blocks at all. It gives you the same ride as factory and if your springs arn't worn out then don't worry about them

ever heard of axle wrap? i snapped a ome 2" leaf pack using a 3" block. a buddy snapped a leaf in his fullsize chevy with 4" blocks