How much lift to level my Tacoma?

Where do I measure my '09 Tacoma double cab TRD to figure out how much I need to lift the rear to level the truck? I bought it used and the previous owner had installed a leveling kit but I didn't know he'd also put in an AAL.

A dealer took out the AAL when they replaced the rear leaf springs on the recall, and didn't tell me. They later claimed they tech didn't notice, but eventually sent me a photo of the old springs and it was pretty obvious.

So now my truck sits low in the rear and I want to level it again.

Thanks.

 

if they took out a AAL and its not level anymore, then just buy another one and install it... problem fixed