Here's a start:

http://www.persh.org/Pickup/FrontSuspension.htm

1962 was the last of the torsion bars, so I don't know what frame differences may exist between 62 and newer, but I doubt there are many. 63-87 crossmembers are basically the same, so it makes switching to a 73 or newer disc brake front end easy. You can also swap power brake boosters and steering fairly easily.