Joe,I think you've just confirmed my suspicions about the shocks.
Personally I would try and get Gas shocks as they will dampen the 'bounce' a bit better.
I hope you get the problem sorted.....Keep us posted.
1950 Chevy Advance Design 3100 in Scotland In the Stovebolt Gallery More pix on Flickr. I've definately got this truck thing in my blood ... my DNA sequence has torque settings "Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.