Do I need to add a leaf?

Purchased some bilsteins and new coils. Planning to set the front to 1.75. Do i need to add another leaf to the back to level? I bought the truck stock that already has 4 leafs.

 

I didn't at first with mine set at 1.75" with the post-tsb rear leafs and it looked like it sat perfectly level. But with a little weight in the bed, and when I have my canopy on the rear sits 1" lower than the front. So i just bought a 1.5" toytec AAL which I hope will be coming soon. I figured even with my .5" higher rear it'll still look level. If i were you i'd just put them on at 1.75" and see how they look. if you don't like it you can AAL down the road.