Mike some folks have done this swap with 2wheel drive frames w/the 1/2tons, but a lot of them have the wheels sticking outside the wheelwells. BUT since your truck is a BIGG truck the front sheet metal is longer & wider then the 1/2ton stuff so it should fit under there ok. The only problem I would see is filling the wheelwell w/tire since the stock tire is a 7.00/20..Joe