1965 C10 bumping sound in front end

[65truckowner]

I have all new ball joints and shocks on my 1965 C10. The a arms are tight also. When I drive it down my gravel driveway there is a bumping sound coming from the passenger side front end which sounds like a loose shock. I jacked up the front and put a bar under the tire and lifted it up and down but nothing is loose. What else do I need to look for?