Burdar put the word out over on the E-Bodies.org site. Hopefully we'll get you some help on the E-Body stuff. I looked in the 73 parts catalog and didn't see a listing for 2 steering shafts, so I'm thinking that it might be only a change to the height of the grease compartment of the coupler? But the question would still be, When did they change happen?

https://forum.e-bodies.org/wheels-tires-...er-length/1256/