Agree, more wind resistance. It will add some to the difficulty, but I think we are ok. The REAL test will be when we get the gears changed and the 5.9 in it. Technically, at that point it would easily beat my 360 Duster if the drive train was in another Duster. We'll know then how much the truck is holding it back. IF it goes 12's, were in great shape heading into the big block.