Strange question. Does any know how long the driver side front drive shaft is? Or can I just measure from the center of the "pumpkin" to the Birfield to get a good idea? I have to re do my Birfields but will be working in tight quarters on the driver side. It would really suck to get it all apart and not have enough room to slide the axle out. Kind of hard to move the truck at that point. Other option would be to do passenger side and turn truck around then do driver. Not ideal but not really the worst thing. I tend to do one side at a time anyway.