suspension problems

I,m following the G body susp upgrades from "Hack Job hot rod shop" front end has been completly gone through all joints new springs,shocks ,ect. all tighgt! She still feels like gumby going down the road! the steering box has no slop, new steering shaft is tight..Steering wheel has 2 in +...

Hey guys its been a while since ive posted. Ive got a problem with the ss that keeps getting worse! It started off as a little bump-steering and has gotton dangerious! After a spirited blast down the hway yesterday somethings got to give! A little background on the ss. 5.3 t56 aftermarket upper...