Hello, My 2001 superduty appears to have 23/4 inch blocks in the rear I have heard that some S.D's had 4inch blocks. My U-bolts have plenty of thread and was hoping i could locate these tall blocks and make the swap. Has anyone done this? anyone have any factory tall blocks they want to sell? Thanks Howie

 

Yes it can be done but Howie I'd recommend REPLACING those u-bolts when you swap out those blocks. They stretch ya know.

 

have you looked at any of the previous post messages. there is already alot of questions and answers already on here about this?

parts man