Posted by DG on Saturday, February 08, 2003 at 10:29PM :
In Reply to: David, there are some pictures of rear axles on my website.. posted by Eric B. on Saturday, February 08, 2003 at 9:43PM :
The 1957-58 uses the same narrower springs and a narrow block about 1 1/2" thick and slightly tapered towards the front, 1959 on use a wider spring and the taller and wider block which are closer to 4" tall.
Parts book gives numbers/description as-
Spacer w/dowel
w100 right #1920098
left #1790841
w200 right #1920100
left #1797245