jmader, just wanted to suggest that you X out the last 4 numbers of the vin in post 9. Those numbers are your serial number and they are unique to your truck. The other numbers and letters (except the assembly plant code) can be figured out just by looking at the truck. So the numbers you should guard are the serial numbers and the assy plant code. Here is a 67 gmc, USA built, VIN Number decoder, so you can see what I'm saying.
EDIT: Also edit the number in post 1 (#XX)