i have a 97 f150 lariat and am trying to put a 2-3 inch lift on it but trying to do it cheaply so i want to put spacers in the back leaf springs and a leveling kit in the front but i do not know to much bout the leveling kits would that work?

 

You should look for the "keys" that realign your torsion bars. They work pretty good. They are available from tuff country or on ebay. Here is a simple kit that will get you 2-3"'s, Good Luck.
http://cgi.ebay.com/ebaymotors/3-Sus...Q5fAccessories

 

do u think the blocks on the rear leaf springs make it too stiff or ruin my leaf springs?... and how do the leveling kits work as in installation terms

 

The rear blocks wont change your ride because they do not change anything wiht your actual suspention. The front can involve some work because you need a special clamp to install the new keys. A shop could probably do it for you if you did not feel comfortable. Go check out idasilva644 or colton's page. They are on my friends list. they installed them on there trucks. I am going to intall a set on my truck this winter.