Thanks for the info everyone! I'm either going to go with the billet spacers or just drill out my shafts for the larger bolt pattern I think, If it was just factory wheels, I'd just carry 2 spares, but since the truck has nice looking AR aluminum wheels on it, I'd like to keep them and keep the bolt pattern the same, I do need a sure-grip for sure in Iowa with our crappy winters!!!! Anybody want to trade a lbp sure grip with 3.23 or 3.55 gears for a sbp sure grip with 3.21 gears?