They should. Several folks in the Diesel Power Challenge ran them. I have a 2 inch level kit, and run 325/65 r 20s, on 20 x 10s, with 4.75 back spacing. They stick out 2 inches farther than stock. So, your 305s should fit with no issues. If anything, you will prob have to trim your fender skirts on the back side of the wheel well. I had to trim A LOT.
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