The answer to your question is very likely: Every part that moves, front and rear. If all of the moving parts aren't worn out, they are out of adjustment. It is now time for you to become intimately familiar with the entire steering and suspension systems. It is way more fun than body work!
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission