The reason I ask if the car was taken apart is because I have seen these issues before, generally after a rebuild or tear down. i believe you have the cross weight either so high or so low it is causing your issue. Roll it on the scales and see where you are at. The other thing i would look at is the clip position on the shocks, make syre they match the spring size (8 or 10 inch). Generally the cross weight being so far off will do this.