This may have been asked already but I searched in this thread for "drive shaft" and "driveshaft" and only found two posts where it was mentioned. How did you have your one-piece shaft made? Did you just hand it off to a DS shop and say "make me this in one piece"? I have a pretty good feeling that I will need to do a little more hand holding with my local shop. I am attempting to figure out what others have done for the transmission slip yoke and the flange at the rear differential. I could have sworn I stumbled across someone saying that the Dana/Spicer part number for a slip yoke that works is but I can't find it again... It looks like the rear diff flange on your shaft is a fabricated piece. I am guessing that your local shop just made that based on the OEM unit? How much did the shaft cost you in the end? If you can share any info it would be a huge help.