Steeroids Issue, need some help.
 

Working on this 69 Camaro and it has a Steeroids steering rack into it. I am putting a flaming river Steering column into it. The column is a 3/4" DD shaft on it. The shaft coming off of the rack is something really weird, they claim it's a 3/4DD shaft but when I compare a 3/4DD u joint to it, it's shorter then the 3/4DD shaft but it's wider...........if that makes sense............

Any idea what it would be ?



Thoughts ?