It has a slight knock in the motor. When you start it up it will not knock but when it idles down and warms up it will start knocking a little bit. If you put your hand on the valve cover you can feel a tapping on it.
I have a link to the pics here.
Jason Dennis's The truck for sale Photo Album - MySpace Photos
Need to sell I got Laid off a while ago and cant get back up on bills.
You can get ahold of me thru my email too firstname.lastname@example.org