I know this is a old thread but I do them, i don't have a performance shop but I have done several sets for people including my own and a friends pulling truck, I'm a diesel mechanic by trade for a dealer so it will be done right
It is ford country. FYI if anyone is thinking about going to Twisted Diesel in Eastern VA don't bother. He knows about as much about Duramax's as I do (which isn't much)
Thanks for all the replies. I ended up traveling about 120 miles north and having Performance Diesel Warehouse take care of it (Grantville, PA). However, I do have some other things I would like to have done too, so I'll send a PM your way Nightlb7.