I found a couple of bushing companies that are interested in helping us if we can provide the sizes for the '58 rear bushings.
This is what I have......
You'll need to measure yours and take a look. I know its a one year deal.
If you don't see it there, try......
call him, he might be able to help if you know what you need.
PO Box 4283
Coos Bay Oregon 97420