Here, let me see if I can help you out with the pic thing man.







First if the kit weed put up is yours, you shouldn't have a block. They should've sent an add a leaf. You may want to measure the block they have in the back. I'm thinking it should only be a 3" block, well that's normally what is sent in the rc 6" lift. It may even be 3.5, but anything above that may send the rear up higher than the front and make it not level. On a side note, the pic of your truck looks pretty level to me.

 

wanapl02 i just looked under my truck at the rear axle and i counted the leaf springs and there are also five on mine but i don't have a block under the springs. i am no expert but i think the second leaf spring from the bottom is the add a leaf. but like stated above your truck looks pretty level in your pic. could be the angle of the way the pic was taken. hope this helps out.