Do I need 1.5 aal or 2in aal

gonna put 4 Billy 5100 set at 1.75 on my stock 2011 double cab TRD off road. No TSB springs. These are the old 3 leafs. I have a drawer system I build in the bed that prob weighs 350-400 lbs with tools. Sometimes I pull a trailer. I want to make sure that the rear is not squatted down with the heavy weight in back. Should I go with the 1.5 aal or the 2.0? I don't mind if it has a little bit of rake

 

If the lifts give me the numbers they claim I should have about 1 inch of rake with the 1.5 aal. I think I go that route

 

From what I've seen to most aal are 1.5 because they suggest removing the overload but if you leave the overload you should get 2". Feel free to fact check that because I may be wrong. Learning as I go. I'm looking at doing the same rear lift. Wheelers offroad seems to have the best price I've found. Like $150. EDIT: I'm referring to the progressive AAL