How do you check bump steer with an angle finder? we allways unload the torsion bar, and set up a dial indicator system on the hub, and run it up and down throughout the suspension travel, checking for toe change during compression and rebound....
Ditto, and don't forget to check it in all combinations of jounce and rebound throughout the range of steering all the way out to both full right and left lock.
Also, although the rod end/bolt arrangement has the possibility of up and down adjustability, you may find shimming of the steering box mounting bolts and changing the angle of the idler arm by slotting/washering the mount (making the mount adjustable by cutting it loose from the K frame and using a bolt/shim arrangement to mount it to the K instead would be another way of skinning the same cat) still necessary to come close to zero bump.
And while I'm aware the Furd/Chivey crowd (and racer types of other persuasions) commonly use them (rod ends/bolts) for this purpose, with the forces involved here, I can't help but wonder if a rod end hanging down on a length of bolt shaft in single shear (even spacered/shimmed) would be prone to flexing/breaking, and still prefer the security/accuracy of the stock type tapered stud arrangement.