i was looking at eagle 102 17x9 with buckshot mudders in 305/70/17 and was wonders if they will fit and what backspacing i will need thanks in advance

 

That wheel is only offered with 4 5/8 inches of backspacing for your truck, which is what you need. The 305/70-17 is basically a 34x12.50 tire. You will have to crank up your torsion bars and trim a little plastic off your front bumper's lower valance to fit that combo.