Hope u guys can help me with my question.  I now that chevy 3/4 tons and ford 3/4 tons have the same bolt pattern, 8x6.50.  I was told that only one would fit on the other.  I don't know if it was that the ford would fit on the chevy or if it was chevy that would fit on the ford.  I was told the difference is in the center hole, one is supposed to be bigger than the other.  The problem is i can't remember and i could really use the help.  Thanks