When did Ford start putting the starter solenoid on the starter instead of on the fender?

When did Ford start putting the starter solenoid on the starter instead of on the fender?

Last time I worked on one was 1973, and due to a hole in the fender, I showed the owner how I could start it without opening the hood. But I have to crawl under (hard work at my age) for the E-450 I bought last month.