There is a section on this site that provides paint codes.
Click on the link below.
The correct colour is Flambeau Red for the frame, rims, axles, engine etc.
The tin is Desert Sunset.
Whether those codes are for enamel or not, I don't know. But at least your body shop guy should be able to get them translated to whatever type of paint he prefers to shoot.
If you need further help with your restoration, feel free to send me a PM.