How many acres was an 8N designed to farm, when new?

[Bentrim]

If you wanted mounted implements you had to dedicate them to the tractor. We had snap coupler plows for the ACs but we also had a pull type trip plow for the old F-20. Other than plows and cultivators there weren't many mounted implements.

Most implements back then were pull type so the was no problem with hitching it. And most used a mechanical lift or lever, hydraullics was not a popular option on the larger tractors back then or only was used for the cultivators or sickle bar mower.
The PTO may have been more of an issue as some were high others were low, some were 1 3/8 and some were 1 1/8. Some were too far or too close to the hitch point. I don't know when all that was standardized.
If you consider the hitch issue -- Ferguson and Ford used the three point hitch, JD used the Yakima hitch and then went to an odd three point for the 50,60, and70 withe the 40 using a three point after the Yakima hitch. Case had the eagle hitch, AC used snap coupler IH used the fast hitch.
Most row crop tractor usually had some type of mounted equipment that was brand specific. Some mounted equipment such as corn pickers only fit certain brands and then not all models.

 

[coast40]

Ford Flathead in a Ford tractor.