Jordan, please don't use a concrete block to hold the truck up. I have seen those literally crumble underneath the weight of a vehicle, and even one fall on a freind of mine once (the car was a '50 Chevy 2 door). The only thing that saved him has that the tires was still on the car. You really need a good set of jackstands to use under the truck. There's some decent ones relatively inexpensive at wal-mart, Sam's Club has really nice ones cheap, too. Sears has them also.
