Generally there are two circuit breakers and one fuse under the dash. There might be more depending on accessories and such. Turn signals have a fuse if the car is so equipped and same for the clock & radio. They usually have in line fuses near the component. If your car has overdrive, there is a fuse in the overdrive relay.
The circuit breakers take most of the load including ignition, instruments, & head/tail/park lights. I'm more familiar with the Mercury cars of this time frame and they are mounted under the dash and can be a real bear to get to since they are mounted above the parking brake handle on the 50/51 types. I'm not sure about the shoebox Fords but I suspect they are under there somewhere. My Ford wiring diagram shows a circiuit breaker panel with two CBs and one fuse. Another CB is added if the car has a convertible top set up so the panel is usually big enough for three CBs on a Merc but I'm not sure about a Ford.
Kerby