Hey Brandon!
Why don't you swing over and check out this thread over in the Detailing section of the board. There's tons of information on cleaning up your ride, motor, frame, etc.
http://67-72chevytrucks.com/vboard/s...d.php?t=340322
Let me know if you have any other questions after looking through some of the posts from the thread above.
Simple Green works pretty good with a pressure washer.