I read that you just have to drill out the holes for the bigger bolts. We'll see not even sure I'm going to do it yet but I will have them in the garage so i can always compare and try.
The 08+ leaf springs are longer and have less leafs so they ride nicer but they squat a lot compared to the older leafs. To compensate for that i was going to get some rear airbags to fill up when hauling and that way it rides nice but don't squat any more than she used to. I am also looking into nicer riding front leafs so that i don't have a nice ride in the rear and stiff up front. I was going to get rear 08 lift springs and front lift springs form the same company that way they ride equally.
04 F250 Ext Cab Short Bed 5.4l 4x4 Build Thread
,08 Dash Swap
95 F150 Reg Cab Short Bed 4.9l 4x4 Build thread
07 Expedition Eddie Bauer 5.4l 4x4
2009 Ford Focus 4 banger...too fuel efficient for me (belongs to the wifey)