Information on all categories of 3 point hitches is located here.... http://www.antiquetractors.com/Research/3points.htm
A category 2 3-point hitch typically has a distance of 32 inches between the lower lift arms. The lower lift pins are 1 1/8 inches in diameter. The lift capacity can range from 3,000 to 5,000 pounds depending on the manufacturer and specific model.
CHiPs - 1977 Hitch-Hiking Hitch 1-17 was released on: USA: 9 February 1978 Belgium: 2 September 1981
It is located on top of the transmission where the shift cable attaches to the transmission.
The Hitch Hikers Guide to the Galaxy - 1981 1-1 is rated/received certificates of: Australia:G
A category II hitch is a type of trailer hitch commonly used for towing trailers or other heavy loads. It is designed to handle heavier loads compared to a category I hitch, making it suitable for larger trailers and equipment. Category II hitches have a 1 1/4-inch receiver tube opening.
The three point hitch refers to the way ploughs are attached to an agricultural tractor. The dimensions of a category 1 hitch is 3/4 inch x 7/8 inch.
Category O is the very light one. I don't know the specs exactly to where it changes to a Cat 1, but it should include large garden tractors and such.
It all determines what type of truck that you have. Some trucks require a 1/2 hitch while others need a 3/4 hitch. Please ask the person you're going to buy the hitch from or a mechanic for which one is appropriate for you car.
The Hitch Hikers Guide to the Galaxy - 1981 1-2 is rated/received certificates of: Australia:G
The Hitch Hikers Guide to the Galaxy - 1981 1-3 is rated/received certificates of: Australia:G
The Hitch Hikers Guide to the Galaxy - 1981 1-4 is rated/received certificates of: Australia:G
The Hitch Hikers Guide to the Galaxy - 1981 1-5 is rated/received certificates of: Australia:G