Who told you it takes 8 hours to lift the cab on an F250? It actually takes about 45 mins. On 08+ Ford Superdutys, its even faster with quick release tabs. Its hard to pack a big diesel under a hood, so the easiest way to get to them is to take the cabs off for major work. So to do this they make cab removal easy. But if you dont have access to a lift, you CAN do it with out removing the cab. Its just much easier with room to work.