We already have a 2001 super crew f150. and now my were looking to get a f250 Super Duty. preferably 7.3L power stroke w/auto. Does anyone have any idea what a 99-00 model is going for? Also what is the diff between the 250 and the 350 single wheel besides springs? This is gonna be a tow rig. Have there been any problems w/the auto's overheating? is the dual alternator option worth it on such a new street rig? Also has anyone used the hypertech programer on one? I heard it gives you 109 ft/lbs of torque over stock and seemed too good to be true.