i have an 08 f250 with a tired gearbox it takes a lot of effort to turn so im thinking about putting in a new power steering pump and also swapping out my steering box for one off of a 2011 and up i hear those are 4 turns for full lock. (08-10 are 3.5) if it doesnt fit then ill just stick to my original idea in getting a readhead steering box. So i am wondering if the spline inputs are the same.