JD Bob,
For my 46, I went with the modern wire harness from Carters. Since I am building a driver, I didn't want the extra cost of the cloth harness. (in Carters, it was called Cloth or modern wire or something similar)
When it showed up, I was impressed with the way it looked. The directions were easy to follow to boot. The modern wire had a woven cover that made it look like it belonged in the truck. Everything was bundled nicely so far, it looks good in the truck. The items I have wired up function as they should.
Probably not a concern for your 58, but another good point was that the harness came pre-wired for signals.
My $.02...
