Help with lift kit

[brad1982]

I bought an 03 1500 quad cab 4x4 and when I test drove it I noticed it rides really smooth. I did not think nothing about it and I got to noticing that my truck sits about 2 or 3 inches lower than a stock 1500. I have been wanting to lift it and yesterday I noticed that on the rear axle there are no blocks. I am sure they come with factory blocks on the leafs. I am not really sure what they did to lower the front to match. Any idea of what might have been done and what I might need to get it a couple inches higher than stock?

 

[brad1982]

Here are a couple pics of the truck