2.7L lift questions

I’m planning on picking up a lift here in the next few weeks and I’m scratching my head a bit on how I’ll get it level. I’m trying to shoot for 2.5”. I have a 2.7L standard cab, a camper shell on the back, and always have around 200-300 LBS in the bed.

I figure 884’s and 5100’s up front will get me right about there from what I’ve read. Since I have about 400 LBS on the back regularly I’m just not sure what size leaf pack/aal I should go with to level it out. Anyone have any ideas?

 

With the weight on back I would say 1 inch lift in the front. I think its the first notch on the 5100.