I restored a '64 that was abandoned in a farmer's field.
I think it was "rated" 42 hp. 6V electrical system. If I drove it nice, I could 39-40 mpg.
It could not get out of its own way. It was pathetically anemic. And the head lights were a joke.
I eventually put in a 1.6 litre engine rated at 60 hp and converted to 12V. F/E dropped into the 20's.
troy