I have the stock 15" steel wheels on my '86 F150 now. I got a set of 31" tires free from work that require a 16" wheel. I want to get a set of 16" wheels to mount them. What backspacing do I need? Its the 5 lug bolt pattern, is that 5 by 5.5"? I heard Dodge wheels fit fords, is this true? If so, then maybe I could buy a set of Dodge wheels... Any recommendations on what wheels I should get, be it OEM wheels or after market? Thanks