i have looked and searched. looks like 2.5-2.75 backspacing is best for no grinding. then 3.50 range will need some grinding to clear. the question i have is would it be worth my time and money to use my 4.25 backspaced rims and run 2" spacers or get the correct rims? and just how much grinding is needed with the 3.50 range rims and pics would be great if you have them.