Michael,

Titleist will only rehead Vokey wedges for warranty issues only. So you will need to purchase new vokey wedges with the project x 6.5 shafts.

Or buy off the shelf Vokeys if you can find them and switch the shafts in.  I was in a golf store and they had a trade in vokey wedge of the same type I play that someone had shortened an inch and then hit twice or 3 times before selling it back.  Nobody wanted a short wedge so I got it for half price.  I have lots of pullout shafts to put in it.

If you're going to order wedges, consider the TVD wedges.  I bought a pair for my son for Christmas and I'm jealous I didn't buy a pair for me.  I just won a tournament at the club and am using the script for a 910F 3 wood but may use the remainder toward a TVD 58 wedge of my own.  --Jerry

i had the same problem once when i played in college and what i did was take my old wedges and new ones to one of our coachs (they were also the pro at our practice facility) and he swaped them out it was a painless process.