I have searched and can't find the info I was looking for so here it go's my truck measures 37" in the front and 39.25" in the rear from what I can find a 2" leveling block is the smallest they make I don't want my truck level because if I have a load on the rear I don't want the front up higher so if I want more of a rake than .25" could I lower the torrsion bars or is there a smaller spacer availible.

 

Your truck is a 07 there are no torsion bars to adjust .
They do make a 2" leveling kit and a 2.5" and a 3" kit there is realy no way to keep your back in from droping with a load unless you install a airbag system back there.
I would check out hell bent steel on the web they have a good price on a 2.5" leveling kit they always have a sale for around $60 and free shiping.
2.5" is just right.

 

I would go with the Autospring 2" leveling kit. A lot of members on here have them and like the turnout.

WEBSITE
EBAY STORE

$70 isn't a bad price!
I'm about to get the 2.5" kit, but I rarely have a load on the back end.

 

I'd go with a 2 or 2.5 inch leveling kit. After you install it, decide if you want the rear any taller. If you do, just add a taller lift block out back.