Mark writes: The 1965 Plymouth Fury / Sport Fury Steering Coupler (Rag Joint) is not like what was used on B Plymouths. No flange bolts are used; instead allen head bolts are used and these are what lie in the recess of the rag joint, two going through one way, two the opposite way and attaching to the flages of the steering column on one end and the steering coupler on the other end. Note: in order for the horn to work you need to ensure a jumper wire for a ground goes from one flange to the other. People tend to throw this away and later find the horn does not work and cant understand why.
Replacement new Rag Joint
-- approximately 2 3/4 inches wide
The cap screws are 1 1/4 inch long, I believe they are 1/4 inch wide, maybe 5/16 inch. Take the new rag joint to a hardware store and size the hole up to the correct width. Be sure to buy the black hardened cap screws and not the cheap silver ones. Put the steering shaft side on first then the coupler shaft, it will be a little tricky but will go together. The nut and washer on the flange side - cap screw in recess of rag joint. As noted, it is easier to install the rag joint first on the steering shaft, then install coupling shaft onto joint.