I do not presently have steering drive shafts in my inventory (changes all the time), but I recommend you check out the Borgeson steering shafts at Summit Racing. You will have to know if the splines on the input shaft of your gear box are 3/4-30, 3/4-36, or 13/16-36.
This is spot-on information ^^^^^. Your steering drive shaft installation is more home-made than I have ever seen, and installer did not leave a "slip-yoke" anywhere in the system. We actually tested, and the gear box moves 3/8" due to frame flex, soooo steering drive shaft has to be able to...