Are the castor wedges on the front axle?
Tie rod ends could be worn out.
Shocks will tame the front axle from bouncing.
Weight in the bed will help make the springs work. Without weight the springs don't.
Having the tires trued will smooth out the ride.

Wayne
1938 1-Ton Farm Truck
Stovebolt Gallery Forums
1989 Silverado
1996 Mustang GT convertible
When I die, I hope she doesn't sell everything for what I told her I paid for it!