I have a 2000 F250 Superduty Powerstroke. I'm looking to lift it cheapest way possible. its a daily driver and won't see anything rougher than a muddy jobsite. i'm hoping i can throw four inch blocks front and rear without extending anything except shocks. any info would be appreciated.  

You NEVER use spacer blocks in front. It can cause severe spring wrapup under braking and cause control issues. In back, 4 inches is more than I would do with a block too. Blocks increase the leverage of axle trying to wrap up springs from torque loads on axle.