I mention this fact because it relates to the difficulty 5th gen owners often have in trying to fit a larger wheel and tire combination.
It actually resulted in a large scale front wheel bearing recall in 1978, when a number of bearings failed due to the increased load. In 1978, when the new “A” body (later to be designated “G” body) cars were introduced, GM departed from tradition and moved the tires more outboard of the chassis than in previous models. Considering the large number of tire / wheel fitment questions asked about 5th Gen Caminos, I decided to incorporate a number replies I had posted over the years into a single post in the effort to share my experiences over the years with fitting larger tires to my ‘87.