There’s not a clear cut answer to this.  Ford used different manufacturers and depending on who made it and what parts were available will dictate what u-joint you have in the vehicle.  All you need to do is measure the cap size on the front u-joint on your stock driveshaft and then measure the cap size on the new PI aluminum driveshaft.  If they’re the same size then it’s just a straight swap and put the civilian yoke on the PI shaft.  If it’s a different size, just get the correct hybrid joint using the dimensions you got earlier (Hybrid joint found here: http://adtr.net/product/ford-crown-victoria/moog-hybrid-u-joint-1330-to-1350/) and then install the civilian yoke on the PI shaft.