That's a great looking TF! A few observations:
- I bet the original owner bought it as a VERY well appointed truck. You have a chrome grill. The big back window might have been a necessity due to the winch rig in the back. Spot light sure was a good idea. The speaker- was that for the AM radio? I doubt there was radio dispatch back in '58, but then again, that was before my time.
- It is possible that this was an end-of-the-year '58. If that is the case, it is also possible that the inventory of '58 fender badges was exhausted when your truck was built and they started using the newer '59 badges. Seldom does an assembly line have a point transition from one model to another- it tends to phase in.
- The lights and horn up top are perfect! I wouldn't change a thing!
- What is that box between the shifter and the firewall, that would be between where the starter pedal (if you have one) is positioned and the heater plenum? I see some small lights on it.

If I ever needed a tow, I'd hope to get hooked up to something as stylish as your rig, rather than the cookie-cutters out there nowadays.

Bill