Gasser Handling - Specific Question

I had a Chevy on the p30 chassis that wandered. New Koni shocks,steer safe,Henderson super steer bell cranks,rear trac bar and coil springs,ipd larger front sway bar with ploy bushings front and rear. Three or four front end alignments a couple sets of tires a few times over the cat scale and guess what it still wandered.
I finally fixed it





I sold that POS and got this DP