yeah the superduty shafts use a 4.25 bolt circle on the flange so they bolt up to the had flanges no problem. i got lucky and found one at a junkyard that is too long but i got it for 25 bucks. then a retube and rebuild for 200 bucks is waaay cheaper than a new shaft from anywhere around hre.
i also got lucky and found one that was a direct bolt in to my k5.
i also got lucky and found one that was a direct bolt in to my k5.