* Bolt Pattern: This is the most important. It refers to the number of lug nuts and the diameter of the circle they form. They should match exactly. While likely the same, there's a small chance Ford changed this between model years. Check the wheels' specifications for the bolt pattern.
* Wheel Backspacing: This is the distance between the mounting surface of the wheel and the inner edge of the wheel. Incorrect backspacing can cause rubbing against the suspension or brake calipers. The backspacing should be similar or compatible; otherwise, the wheels might not clear.
* Wheel Diameter and Width: The size of the wheel (diameter and width) will impact fitment. While larger diameter wheels might fit, larger widths may not clear the fenders or suspension components.
In short: Don't assume they'll fit. Find the specifications for the wheels from the 1980 F100 and compare them to the specifications for your 1983 F100. You may need to consult a Ford parts catalog or a wheel fitment guide to get the specific information for your truck.
