I doubt that a direct replacement torsion bar cross member is available for a 1962 Valient. You will need to look for that. Try a parts wanted post. But be careful, any OE 62 cross member that you get is as old as yours. Get lots of photos prior to the purchase
You may be able to modify a cross member from a more recent A body to fit. See what AMD has available.
At slantsix.org there are several folks with the first generation A bodies, you may want to also ask over there.
