ford truck bolt pattern
There were very few light duty F 100's built in 1980 that used the passenger car 5 x 4.5 patterrn and 14 in wheels. At the end of the production run the factory donated a pallet of 9 in rear ends to the college where I was teaching. I did some saturday work building selves and the dept head asked me if I wanted the ones not used for Demo's . I said they were too wide for my roadster projects but decided to take one, about a month after they were all gone I found that they were all detroit lockers. Government regulations changed and it was cheaper for the factory to build F 150's with a higher GVW rating and fall into a different emission classification and not require expensive emission equipment, air pump, cats, etc.