Leveling kit

I want to get a 3 inch leveling kit on my 2003 tacoma how much would I need to lift the rear to make it all level. I'm seeing kits that come with either 1",1.5", or 2 " and dont know what to get.

 

when i first lifted my double cab, i did 3 inch up front and 1.5 in the rear with shackles had it sitting pretty evenly. the ride quality wasn't that great and in the dirt, even worse...

 

A leveling kit just raises up the front high enough to where it will sit level with the rear. Typically the stock ride height is about 2" lower in the front than in the rear