Change Rear Block

I have a Revteck 3" lift installed by the dealer when I bought the truck. The rear block is 1 3/4" . I have a friend that works a lathe and can make me a 2 1/2" block. My question is, is the Aluminum a specific grade for blocks, and how hard is it to change out the rear blocks? (Me not being a mechanic)

 

How Cheap is cheap?.........and how difficult is it to install? Does anything else need to be adjusted?

 

Switching out the rear block is really simple. You could probably do it in about an hour. I think you can actually download the installation instructions from Revtec's website- if not, try Toytec (same procedures).

 

Thanks!